initial commit

activate_venv.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+source venv/bin/activate

backups/main.py.bak

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+import curses
+import chess
+import chess.engine
+import os
+import random
+
+# Initialize Stockfish engine
+stockfish_path = "/usr/games/stockfish"
+engine = chess.engine.SimpleEngine.popen_uci(stockfish_path)
+
+# Define ASCII/Nerd Font pieces
+PIECE_SYMBOLS = {
+    'P': '♙', 'N': '♘', 'B': '♗', 'R': '♖', 'Q': '♕', 'K': '♔',
+    'p': '♟', 'n': '♞', 'b': '♝', 'r': '♜', 'q': '♛', 'k': '♚'
+}
+
+def draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square=None, move_history=[], legal_moves=[], player_color=None):
+    stdscr.clear()
+    
+    max_y, max_x = stdscr.getmaxyx()
+    
+    # Draw the move history
+    move_history_y = 2
+    stdscr.addstr(0, 0, "Move History:")
+    for index, move in enumerate(move_history[-(max_y // 2 - 2):]):  # Display limited history
+        stdscr.addstr(move_history_y + index, 0, move)
+    
+    # Draw the chessboard oriented towards the player
+    for board_y in range(8):
+        actual_row = board_y if player_color == chess.BLACK else 7 - board_y  # Orient the row correctly based on player color
+        for board_x in range(8):
+            actual_col = board_x if player_color == chess.WHITE else 7 - board_x  # Orient the column correctly
+            
+            piece = board.piece_at(chess.square(actual_col, actual_row))
+            display_piece = PIECE_SYMBOLS[piece.symbol()] if piece else ' '
+            
+            # Determine square color
+            square_color = curses.color_pair(1) if (actual_row + actual_col) % 2 == 0 else curses.color_pair(2)
+            is_selected = (selected_square == chess.square(actual_col, actual_row))
+            is_legal_move = chess.square(actual_col, actual_row) in legal_moves
+
+            if is_selected:
+                square_color = curses.color_pair(3)  # Highlight selected square
+            elif is_legal_move:
+                square_color = curses.color_pair(4)  # Highlight legal move square
+            
+            stdscr.attron(square_color)
+            
+            # Ensure that the piece is drawn centered in the cell
+            for line in range(cell_height):
+                if line == cell_height // 2:  # Only draw the piece on the middle line
+                    cell_content = display_piece.center(cell_width)
+                else:
+                    cell_content = ' ' * cell_width  # Clear remaining lines in the cell
+                
+                try:
+                    stdscr.addstr(start_y + board_y * cell_height + line, start_x + board_x * cell_width, cell_content)
+                except curses.error:
+                    pass
+                
+            stdscr.attroff(square_color)
+    
+    stdscr.refresh()
+
+def get_square_from_position(mouse_x, mouse_y, cell_width, cell_height, start_x, start_y, player_color):
+    row = (mouse_y - start_y) // cell_height
+    col = (mouse_x - start_x) // cell_width
+    if player_color == chess.BLACK:
+        col = 7 - col  # Reverse column for black orientation
+    if player_color == chess.WHITE:
+        row = 7 - row  # Reverse row for white orientation
+    if 0 <= row < 8 and 0 <= col < 8:
+        return chess.square(col, row)
+    return None
+
+def main(stdscr):
+    curses.curs_set(0)
+    stdscr.clear()
+    curses.mousemask(curses.ALL_MOUSE_EVENTS | curses.REPORT_MOUSE_POSITION)
+    curses.start_color()
+    curses.init_pair(1, curses.COLOR_WHITE, 94)   # Light brown background
+    curses.init_pair(2, curses.COLOR_BLACK, 58)   # Dark brown background
+    curses.init_pair(3, curses.COLOR_BLACK, curses.COLOR_WHITE)  # Highlight selected square in grey
+    curses.init_pair(4, curses.COLOR_GREEN, curses.COLOR_WHITE)   # Highlight legal move square
+
+    # Get difficulty input
+    stdscr.addstr(0, 0, "Enter difficulty level (1-20): ")
+    stdscr.refresh()
+    while True:
+        try:
+            difficulty_input = stdscr.getstr().decode().strip()
+            difficulty = int(difficulty_input)
+            if 1 <= difficulty <= 20:
+                break
+            else:
+                stdscr.addstr(1, 0, "Invalid input. Please enter a number between 1 and 20.")
+        except ValueError:
+            stdscr.addstr(1, 0, "Invalid input. Please enter a valid integer.")
+        
+        stdscr.refresh()
+        stdscr.getch()
+        stdscr.clear()
+        stdscr.addstr(0, 0, "Enter difficulty level (1-20): ")
+
+    # Randomly assign player color
+    player_color = chess.WHITE if random.choice([True, False]) else chess.BLACK
+    player_side = "White" if player_color == chess.WHITE else "Black"
+    stdscr.clear()
+    stdscr.addstr(0, 0, f"You are playing as: {player_side}")
+    stdscr.refresh()
+    stdscr.getch()
+    
+    board = chess.Board()
+    move_history = []
+    undo_stack = []
+    redo_stack = []
+    cell_width = 5  # Adjusted size for larger icons
+    cell_height = 3
+    selected_square = None
+    piece_selected = False
+    moving_mode = False
+    legal_moves = []
+    original_square = None
+    
+    while True:
+        rows, cols = stdscr.getmaxyx()
+        cell_width = max(5, min(6, (cols - 20) // 16))  # Ensure room for the move history
+        cell_height = 3
+        start_y = (rows - cell_height * 8) // 2
+        start_x = 20  # Start drawing the board from column 20 to make space for move history
+        
+        draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color)
+        
+        if board.is_game_over():
+            stdscr.addstr(rows - 1, 0, "Game Over! Press any key to exit.")
+            stdscr.getch()
+            break
+        
+        player_turn = board.turn == player_color
+        
+        while player_turn:
+            try:
+                key = stdscr.getch()
+                
+                if key == ord('q'):
+                    engine.quit()
+                    return
+                
+                if key == ord('u'):  # Undo both your move and the computer's move
+                    if len(board.move_stack) > 1:
+                        move1 = board.pop()
+                        move2 = board.pop()
+                        undo_stack.append((move1, move2))
+                        redo_stack.clear()  # Clear redo stack as we made a new undo
+                        move_history.pop()
+                        move_history.pop()
+                        draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color)
+                        break
+                
+                if key == ord('r'):  # Redo both your move and the computer's move
+                    if len(undo_stack) > 0:
+                        move1, move2 = undo_stack.pop()
+                        board.push(move2)  # Push computer's move first
+                        board.push(move1)  # Push your move
+                        redo_stack.append((move1, move2))
+                        move_history.append(f"{'White' if player_color == chess.WHITE else 'Black'}: {move1}")
+                        move_history.append(f"{'Black' if player_color == chess.WHITE else 'White'}: {move2}")
+                        draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color)
+                        break
+                
+                if key == curses.KEY_MOUSE:
+                    _, mouse_x, mouse_y, _, button_state = curses.getmouse()
+                    
+                    if button_state & curses.BUTTON1_CLICKED:
+                        square = get_square_from_position(mouse_x, mouse_y, cell_width, cell_height, start_x, start_y, player_color)
+                        if square is not None:
+                            if not piece_selected and board.piece_at(square) and board.piece_at(square).color == player_color:
+                                selected_square = square
+                                original_square = selected_square
+                                piece_selected = True
+                                moving_mode = False
+                                legal_moves = [move.to_square for move in board.legal_moves if move.from_square == selected_square]
+                                draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color)
+                            elif piece_selected and selected_square != square:
+                                move = chess.Move(selected_square, square)
+                                if move in board.legal_moves:
+                                    board.push(move)
+                                    move_history.append(f"{player_side}: {move}")
+                                    selected_square = None
+                                    piece_selected = False
+                                    redo_stack.clear()  # Clear redo stack when a new move is made
+                                    player_turn = False
+                                    break
+                                selected_square = None
+                                piece_selected = False
+                
+                elif piece_selected:
+                    if key in [curses.KEY_UP, curses.KEY_DOWN, curses.KEY_LEFT, curses.KEY_RIGHT]:
+                        rank = chess.square_rank(selected_square)
+                        file = chess.square_file(selected_square)
+                        
+                        if key == curses.KEY_UP:
+                            rank += 1 if player_color == chess.WHITE else -1
+                        elif key == curses.KEY_DOWN:
+                            rank -= 1 if player_color == chess.WHITE else 1
+                        elif key == curses.KEY_LEFT:
+                            file -= 1 if player_color == chess.WHITE else -1
+                        elif key == curses.KEY_RIGHT:
+                            file += 1 if player_color == chess.WHITE else -1
+                        
+                        if 0 <= rank < 8 and 0 <= file < 8:
+                            selected_square = chess.square(file, rank)
+                            draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color)
+                    
+                    elif key == ord('\n'):
+                        if not moving_mode:
+                            moving_mode = True
+                            legal_moves = [move.to_square for move in board.legal_moves if move.from_square == selected_square]
+                            original_square = selected_square
+                            draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color)
+                        else:
+                            if selected_square != original_square:
+                                move = chess.Move(original_square, selected_square)
+                                if move in board.legal_moves:
+                                    board.push(move)
+                                    move_history.append(f"{player_side}: {move}")
+                                    selected_square = None
+                                    piece_selected = False
+                                    moving_mode = False
+                                    redo_stack.clear()  # Clear the redo stack when a new move is made
+                                    player_turn = False
+                                    break
+                            selected_square = original_square
+                            moving_mode = False
+                
+            except curses.error:
+                pass
+        
+        if not player_turn:
+            result = engine.play(board, chess.engine.Limit(time=1.0 + (difficulty - 1) * 0.1))
+            board.push(result.move)
+            move_history.append(f"{'White' if not player_color else 'Black'}: {result.move}")
+            undo_stack.clear()  # Clear undo stack after computer move
+    
+    engine.quit()
+
+if __name__ == "__main__":
+    curses.wrapper(main)
+

build/chess

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+#!/usr/bin/env python3
+import curses
+import chess
+import chess.engine
+import os
+import random
+
+# Initialize Stockfish engine
+stockfish_path = "/usr/games/stockfish"
+engine = chess.engine.SimpleEngine.popen_uci(stockfish_path)
+
+# Define ASCII/Nerd Font pieces
+PIECE_SYMBOLS = {
+    'P': '♙', 'N': '♘', 'B': '♗', 'R': '♖', 'Q': '♕', 'K': '♔',
+    'p': '♟', 'n': '♞', 'b': '♝', 'r': '♜', 'q': '♛', 'k': '♚'
+}
+
+def draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square=None, move_history=[], legal_moves=[], player_color=None, difficulty=None):
+    stdscr.clear()
+    
+    max_y, max_x = stdscr.getmaxyx()
+    
+    # Display the difficulty level
+    stdscr.addstr(0, 0, f"Difficulty Level: {difficulty}")
+    
+    # Draw the move history
+    move_history_y = 2
+    stdscr.addstr(1, 0, "Move History:")
+    for index, move in enumerate(move_history[-(max_y // 2 - 2):]):  # Display limited history
+        stdscr.addstr(move_history_y + index + 1, 0, f"{index + 1}. {move}")
+    
+    # Draw the A-H scale at the top, ensuring each letter corresponds to one block
+    for i, letter in enumerate("ABCDEFGH"):
+        stdscr.addstr(start_y - 1, start_x + i * cell_width + cell_width // 2, letter)
+
+    # Draw the chessboard oriented towards the player
+    for board_y in range(8):
+        actual_row = board_y if player_color == chess.BLACK else 7 - board_y  # Orient the row correctly based on player color
+        row_label = str(8 - board_y) if player_color == chess.WHITE else str(board_y + 1)
+        stdscr.addstr(start_y + board_y * cell_height + cell_height // 2, start_x - 2, row_label)  # Add row numbers
+        
+        for board_x in range(8):
+            actual_col = board_x if player_color == chess.WHITE else 7 - board_x  # Orient the column correctly
+            
+            piece = board.piece_at(chess.square(actual_col, actual_row))
+            display_piece = PIECE_SYMBOLS[piece.symbol()] if piece else ' '
+            
+            # Determine square color
+            square_color = curses.color_pair(1) if (actual_row + actual_col) % 2 == 0 else curses.color_pair(2)
+            is_selected = (selected_square == chess.square(actual_col, actual_row))
+            is_legal_move = chess.square(actual_col, actual_row) in legal_moves
+
+            if is_selected:
+                square_color = curses.color_pair(3)  # Highlight selected square
+            elif is_legal_move:
+                square_color = curses.color_pair(4)  # Highlight legal move square
+            
+            stdscr.attron(square_color)
+            
+            # Ensure that the piece is drawn centered in the cell
+            for line in range(cell_height):
+                if line == cell_height // 2:  # Only draw the piece on the middle line
+                    cell_content = display_piece.center(cell_width)
+                else:
+                    cell_content = ' ' * cell_width  # Clear remaining lines in the cell
+                
+                try:
+                    stdscr.addstr(start_y + board_y * cell_height + line, start_x + board_x * cell_width, cell_content)
+                except curses.error:
+                    pass
+                
+            stdscr.attroff(square_color)
+    
+    # Draw column labels again at the bottom to match the board alignment
+    for i, letter in enumerate("ABCDEFGH"):
+        stdscr.addstr(start_y + 8 * cell_height, start_x + i * cell_width + cell_width // 2, letter)
+    
+    stdscr.refresh()
+
+def get_square_from_position(mouse_x, mouse_y, cell_width, cell_height, start_x, start_y, player_color):
+    row = (mouse_y - start_y) // cell_height
+    col = (mouse_x - start_x) // cell_width
+    if player_color == chess.BLACK:
+        col = 7 - col  # Reverse column for black orientation
+    if player_color == chess.WHITE:
+        row = 7 - row  # Reverse row for white orientation
+    if 0 <= row < 8 and 0 <= col < 8:
+        return chess.square(col, row)
+    return None
+
+def handle_game_over(stdscr, board, player_color):
+    outcome = board.outcome()
+    if outcome.winner is not None:
+        if outcome.winner == player_color:
+            stdscr.addstr(20, 0, "Checkmate! You win!")
+        else:
+            stdscr.addstr(20, 0, "Checkmate! You lose!")
+    elif outcome.termination == chess.Termination.STALEMATE:
+        stdscr.addstr(20, 0, "Stalemate! It's a draw.")
+    elif outcome.termination == chess.Termination.INSUFFICIENT_MATERIAL:
+        stdscr.addstr(20, 0, "Insufficient material. It's a draw.")
+    elif outcome.termination == chess.Termination.FIFTY_MOVE_RULE:
+        stdscr.addstr(20, 0, "Draw by fifty-move rule.")
+    elif outcome.termination == chess.Termination.THREEFOLD_REPETITION:
+        stdscr.addstr(20, 0, "Draw by threefold repetition.")
+    else:
+        stdscr.addstr(20, 0, "The game is over.")
+    
+    stdscr.addstr(21, 0, "Press 'q' to quit.")
+    stdscr.refresh()
+    while stdscr.getch() != ord('q'):
+        pass
+
+def main(stdscr):
+    curses.curs_set(0)
+    stdscr.clear()
+    curses.mousemask(curses.ALL_MOUSE_EVENTS | curses.REPORT_MOUSE_POSITION)
+    curses.start_color()
+    curses.init_pair(1, curses.COLOR_WHITE, 94)   # Light brown background
+    curses.init_pair(2, curses.COLOR_BLACK, 58)   # Dark brown background
+    curses.init_pair(3, curses.COLOR_BLACK, curses.COLOR_WHITE)  # Highlight selected square in grey
+    curses.init_pair(4, curses.COLOR_GREEN, curses.COLOR_WHITE)   # Highlight legal move square
+
+    # Get difficulty input
+    stdscr.addstr(0, 0, "Enter difficulty level (1-20): ")
+    stdscr.refresh()
+    while True:
+        try:
+            difficulty_input = stdscr.getstr().decode().strip()
+            difficulty = int(difficulty_input)
+            if 1 <= difficulty <= 20:
+                break
+            else:
+                stdscr.addstr(1, 0, "Invalid input. Please enter a number between 1 and 20.")
+        except ValueError:
+            stdscr.addstr(1, 0, "Invalid input. Please enter a valid integer.")
+        
+        stdscr.refresh()
+        stdscr.getch()
+        stdscr.clear()
+        stdscr.addstr(0, 0, "Enter difficulty level (1-20): ")
+
+    # Randomly assign player color
+    player_color = chess.WHITE if random.choice([True, False]) else chess.BLACK
+    player_side = "White" if player_color == chess.WHITE else "Black"
+    stdscr.clear()
+    stdscr.addstr(0, 0, f"You are playing as: {player_side}")
+    stdscr.refresh()
+    stdscr.getch()
+    
+    board = chess.Board()
+    move_history = []
+    undo_stack = []
+    redo_stack = []
+    cell_width = 5  # Adjusted size for larger icons
+    cell_height = 3
+    selected_square = None
+    piece_selected = False
+    moving_mode = False
+    legal_moves = []
+    original_square = None
+    
+    while True:
+        rows, cols = stdscr.getmaxyx()
+        cell_width = max(5, min(6, (cols - 20) // 16))  # Ensure room for the move history
+        cell_height = 3
+        start_y = (rows - cell_height * 8) // 2
+        start_x = 20  # Start drawing the board from column 20 to make space for move history
+        
+        draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color, difficulty)
+        
+        if board.is_game_over():
+            handle_game_over(stdscr, board, player_color)
+            break
+        
+        player_turn = board.turn == player_color
+        
+        while player_turn:
+            try:
+                key = stdscr.getch()
+                
+                if key == ord('q'):
+                    engine.quit()
+                    return
+                
+                if key == ord('u'):  # Undo both your move and the computer's move
+                    if len(board.move_stack) >= 2:
+                        move1 = board.pop()
+                        move2 = board.pop()
+                        undo_stack.append((move1, move2))
+                        redo_stack.clear()  # Clear redo stack as we made a new undo
+                        move_history.pop()
+                        move_history.pop()
+                        draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color, difficulty)
+                        break
+                    else:
+                        stdscr.addstr(rows - 1, 0, "No more moves to undo.")
+                        stdscr.refresh()
+                
+                if key == ord('r'):  # Redo both your move and the computer's move
+                    if len(undo_stack) > 0:
+                        move1, move2 = undo_stack.pop()
+                        board.push(move2)  # Push computer's move first
+                        board.push(move1)  # Push your move
+                        redo_stack.append((move1, move2))
+                        move_history.append(f"{'White' if player_color == chess.WHITE else 'Black'}: {move1}")
+                        move_history.append(f"{'Black' if player_color == chess.WHITE else 'White'}: {move2}")
+                        draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color, difficulty)
+                        break
+                    else:
+                        stdscr.addstr(rows - 1, 0, "No more moves to redo.")
+                        stdscr.refresh()
+                
+                if key == curses.KEY_MOUSE:
+                    _, mouse_x, mouse_y, _, button_state = curses.getmouse()
+                    
+                    if button_state & curses.BUTTON1_CLICKED:
+                        square = get_square_from_position(mouse_x, mouse_y, cell_width, cell_height, start_x, start_y, player_color)
+                        if square is not None:
+                            if not piece_selected and board.piece_at(square) and board.piece_at(square).color == player_color:
+                                selected_square = square
+                                original_square = selected_square
+                                piece_selected = True
+                                moving_mode = False
+                                legal_moves = [move.to_square for move in board.legal_moves if move.from_square == selected_square]
+                                draw_board(stdscr, board, cell_width, cell_height, start_y, start_x, selected_square, move_history, legal_moves, player_color, difficulty)
+                            elif piece_selected and selected_square != square:
+                                move = chess.Move(selected_square, square)
+                                if move in board.legal_moves:
+                                    board.push(move)
+                                    move_history.append(f"{player_side}: {move}")
+                                    selected_square = None
+                                    piece_selected = False
+                                    redo_stack.clear()  # Clear redo stack when a new move is made
+                                    player_turn = False
+                                    break
+                                selected_square = None
+                                piece_selected = False
+                
+            except curses.error:
+                pass
+        
+        if not player_turn:
+            result = engine.play(board, chess.engine.Limit(time=1.0 + (difficulty - 1) * 0.1))
+            board.push(result.move)
+            move_history.append(f"{'White' if not player_color else 'Black'}: {result.move}")
+            undo_stack.clear()  # Clear undo stack after computer move
+    
+    engine.quit()
+
+if __name__ == "__main__":
+    curses.wrapper(main)
+

build/install.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# Check Dependencies
+check_dependency() {
+    if ! command -v "$1" &> /dev/null; then
+        read -p "$1 us not installed. Install? [Y/n]"
+        choice=${choice:-Y}
+        if [[ "$choice" =~ ^[Yy]$ ]]; then
+            echo "Installing $1"
+            sudo apt-get install -y "$1"
+        else
+            echo "Stopping..."
+            exit 1
+        fi
+    else
+        echo "$1 is already installed"
+    fi
+}
+
+WORKING_DIR=$(pwd)
+VENV_DIR="/lib/python-venvs/chess"
+BINARY_DIR="/usr/local/bin/chess"
+
+if [ ! -d "/lib:/python-venvs" ]; then
+    sudo mkdir -p /lib/python-venvs 
+    sudo chmod 755 /lib/python-venvs
+fi 
+
+if [ ! -d "$VENV_DIR" ]; then
+    echo "Creating system-wide virtual environemnt..."
+    sudo python3 -m venv "$VENV_DIR"
+fi
+
+

requirements.txt

@@ -0,0 +1,3 @@
+chess==1.10.0
+python-chess==1.999
+stockfish==3.28.0

venv/bin/Activate.ps1

@@ -0,0 +1,247 @@
+<#
+.Synopsis
+Activate a Python virtual environment for the current PowerShell session.
+
+.Description
+Pushes the python executable for a virtual environment to the front of the
+$Env:PATH environment variable and sets the prompt to signify that you are
+in a Python virtual environment. Makes use of the command line switches as
+well as the `pyvenv.cfg` file values present in the virtual environment.
+
+.Parameter VenvDir
+Path to the directory that contains the virtual environment to activate. The
+default value for this is the parent of the directory that the Activate.ps1
+script is located within.
+
+.Parameter Prompt
+The prompt prefix to display when this virtual environment is activated. By
+default, this prompt is the name of the virtual environment folder (VenvDir)
+surrounded by parentheses and followed by a single space (ie. '(.venv) ').
+
+.Example
+Activate.ps1
+Activates the Python virtual environment that contains the Activate.ps1 script.
+
+.Example
+Activate.ps1 -Verbose
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and shows extra information about the activation as it executes.
+
+.Example
+Activate.ps1 -VenvDir C:\Users\MyUser\Common\.venv
+Activates the Python virtual environment located in the specified location.
+
+.Example
+Activate.ps1 -Prompt "MyPython"
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and prefixes the current prompt with the specified string (surrounded in
+parentheses) while the virtual environment is active.
+
+.Notes
+On Windows, it may be required to enable this Activate.ps1 script by setting the
+execution policy for the user. You can do this by issuing the following PowerShell
+command:
+
+PS C:\> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
+
+For more information on Execution Policies: 
+https://go.microsoft.com/fwlink/?LinkID=135170
+
+#>
+Param(
+    [Parameter(Mandatory = $false)]
+    [String]
+    $VenvDir,
+    [Parameter(Mandatory = $false)]
+    [String]
+    $Prompt
+)
+
+<# Function declarations --------------------------------------------------- #>
+
+<#
+.Synopsis
+Remove all shell session elements added by the Activate script, including the
+addition of the virtual environment's Python executable from the beginning of
+the PATH variable.
+
+.Parameter NonDestructive
+If present, do not remove this function from the global namespace for the
+session.
+
+#>
+function global:deactivate ([switch]$NonDestructive) {
+    # Revert to original values
+
+    # The prior prompt:
+    if (Test-Path -Path Function:_OLD_VIRTUAL_PROMPT) {
+        Copy-Item -Path Function:_OLD_VIRTUAL_PROMPT -Destination Function:prompt
+        Remove-Item -Path Function:_OLD_VIRTUAL_PROMPT
+    }
+
+    # The prior PYTHONHOME:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PYTHONHOME) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME -Destination Env:PYTHONHOME
+        Remove-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME
+    }
+
+    # The prior PATH:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PATH) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PATH -Destination Env:PATH
+        Remove-Item -Path Env:_OLD_VIRTUAL_PATH
+    }
+
+    # Just remove the VIRTUAL_ENV altogether:
+    if (Test-Path -Path Env:VIRTUAL_ENV) {
+        Remove-Item -Path env:VIRTUAL_ENV
+    }
+
+    # Just remove VIRTUAL_ENV_PROMPT altogether.
+    if (Test-Path -Path Env:VIRTUAL_ENV_PROMPT) {
+        Remove-Item -Path env:VIRTUAL_ENV_PROMPT
+    }
+
+    # Just remove the _PYTHON_VENV_PROMPT_PREFIX altogether:
+    if (Get-Variable -Name "_PYTHON_VENV_PROMPT_PREFIX" -ErrorAction SilentlyContinue) {
+        Remove-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Scope Global -Force
+    }
+
+    # Leave deactivate function in the global namespace if requested:
+    if (-not $NonDestructive) {
+        Remove-Item -Path function:deactivate
+    }
+}
+
+<#
+.Description
+Get-PyVenvConfig parses the values from the pyvenv.cfg file located in the
+given folder, and returns them in a map.
+
+For each line in the pyvenv.cfg file, if that line can be parsed into exactly
+two strings separated by `=` (with any amount of whitespace surrounding the =)
+then it is considered a `key = value` line. The left hand string is the key,
+the right hand is the value.
+
+If the value starts with a `'` or a `"` then the first and last character is
+stripped from the value before being captured.
+
+.Parameter ConfigDir
+Path to the directory that contains the `pyvenv.cfg` file.
+#>
+function Get-PyVenvConfig(
+    [String]
+    $ConfigDir
+) {
+    Write-Verbose "Given ConfigDir=$ConfigDir, obtain values in pyvenv.cfg"
+
+    # Ensure the file exists, and issue a warning if it doesn't (but still allow the function to continue).
+    $pyvenvConfigPath = Join-Path -Resolve -Path $ConfigDir -ChildPath 'pyvenv.cfg' -ErrorAction Continue
+
+    # An empty map will be returned if no config file is found.
+    $pyvenvConfig = @{ }
+
+    if ($pyvenvConfigPath) {
+
+        Write-Verbose "File exists, parse `key = value` lines"
+        $pyvenvConfigContent = Get-Content -Path $pyvenvConfigPath
+
+        $pyvenvConfigContent | ForEach-Object {
+            $keyval = $PSItem -split "\s*=\s*", 2
+            if ($keyval[0] -and $keyval[1]) {
+                $val = $keyval[1]
+
+                # Remove extraneous quotations around a string value.
+                if ("'""".Contains($val.Substring(0, 1))) {
+                    $val = $val.Substring(1, $val.Length - 2)
+                }
+
+                $pyvenvConfig[$keyval[0]] = $val
+                Write-Verbose "Adding Key: '$($keyval[0])'='$val'"
+            }
+        }
+    }
+    return $pyvenvConfig
+}
+
+
+<# Begin Activate script --------------------------------------------------- #>
+
+# Determine the containing directory of this script
+$VenvExecPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
+$VenvExecDir = Get-Item -Path $VenvExecPath
+
+Write-Verbose "Activation script is located in path: '$VenvExecPath'"
+Write-Verbose "VenvExecDir Fullname: '$($VenvExecDir.FullName)"
+Write-Verbose "VenvExecDir Name: '$($VenvExecDir.Name)"
+
+# Set values required in priority: CmdLine, ConfigFile, Default
+# First, get the location of the virtual environment, it might not be
+# VenvExecDir if specified on the command line.
+if ($VenvDir) {
+    Write-Verbose "VenvDir given as parameter, using '$VenvDir' to determine values"
+}
+else {
+    Write-Verbose "VenvDir not given as a parameter, using parent directory name as VenvDir."
+    $VenvDir = $VenvExecDir.Parent.FullName.TrimEnd("\\/")
+    Write-Verbose "VenvDir=$VenvDir"
+}
+
+# Next, read the `pyvenv.cfg` file to determine any required value such
+# as `prompt`.
+$pyvenvCfg = Get-PyVenvConfig -ConfigDir $VenvDir
+
+# Next, set the prompt from the command line, or the config file, or
+# just use the name of the virtual environment folder.
+if ($Prompt) {
+    Write-Verbose "Prompt specified as argument, using '$Prompt'"
+}
+else {
+    Write-Verbose "Prompt not specified as argument to script, checking pyvenv.cfg value"
+    if ($pyvenvCfg -and $pyvenvCfg['prompt']) {
+        Write-Verbose "  Setting based on value in pyvenv.cfg='$($pyvenvCfg['prompt'])'"
+        $Prompt = $pyvenvCfg['prompt'];
+    }
+    else {
+        Write-Verbose "  Setting prompt based on parent's directory's name. (Is the directory name passed to venv module when creating the virtual environment)"
+        Write-Verbose "  Got leaf-name of $VenvDir='$(Split-Path -Path $venvDir -Leaf)'"
+        $Prompt = Split-Path -Path $venvDir -Leaf
+    }
+}
+
+Write-Verbose "Prompt = '$Prompt'"
+Write-Verbose "VenvDir='$VenvDir'"
+
+# Deactivate any currently active virtual environment, but leave the
+# deactivate function in place.
+deactivate -nondestructive
+
+# Now set the environment variable VIRTUAL_ENV, used by many tools to determine
+# that there is an activated venv.
+$env:VIRTUAL_ENV = $VenvDir
+
+if (-not $Env:VIRTUAL_ENV_DISABLE_PROMPT) {
+
+    Write-Verbose "Setting prompt to '$Prompt'"
+
+    # Set the prompt to include the env name
+    # Make sure _OLD_VIRTUAL_PROMPT is global
+    function global:_OLD_VIRTUAL_PROMPT { "" }
+    Copy-Item -Path function:prompt -Destination function:_OLD_VIRTUAL_PROMPT
+    New-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Description "Python virtual environment prompt prefix" -Scope Global -Option ReadOnly -Visibility Public -Value $Prompt
+
+    function global:prompt {
+        Write-Host -NoNewline -ForegroundColor Green "($_PYTHON_VENV_PROMPT_PREFIX) "
+        _OLD_VIRTUAL_PROMPT
+    }
+    $env:VIRTUAL_ENV_PROMPT = $Prompt
+}
+
+# Clear PYTHONHOME
+if (Test-Path -Path Env:PYTHONHOME) {
+    Copy-Item -Path Env:PYTHONHOME -Destination Env:_OLD_VIRTUAL_PYTHONHOME
+    Remove-Item -Path Env:PYTHONHOME
+}
+
+# Add the venv to the PATH
+Copy-Item -Path Env:PATH -Destination Env:_OLD_VIRTUAL_PATH
+$Env:PATH = "$VenvExecDir$([System.IO.Path]::PathSeparator)$Env:PATH"

venv/bin/activate

@@ -0,0 +1,69 @@
+# This file must be used with "source bin/activate" *from bash*
+# you cannot run it directly
+
+deactivate () {
+    # reset old environment variables
+    if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then
+        PATH="${_OLD_VIRTUAL_PATH:-}"
+        export PATH
+        unset _OLD_VIRTUAL_PATH
+    fi
+    if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then
+        PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}"
+        export PYTHONHOME
+        unset _OLD_VIRTUAL_PYTHONHOME
+    fi
+
+    # This should detect bash and zsh, which have a hash command that must
+    # be called to get it to forget past commands.  Without forgetting
+    # past commands the $PATH changes we made may not be respected
+    if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
+        hash -r 2> /dev/null
+    fi
+
+    if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then
+        PS1="${_OLD_VIRTUAL_PS1:-}"
+        export PS1
+        unset _OLD_VIRTUAL_PS1
+    fi
+
+    unset VIRTUAL_ENV
+    unset VIRTUAL_ENV_PROMPT
+    if [ ! "${1:-}" = "nondestructive" ] ; then
+    # Self destruct!
+        unset -f deactivate
+    fi
+}
+
+# unset irrelevant variables
+deactivate nondestructive
+
+VIRTUAL_ENV="/home/klein/codeWS/Python3/chess/venv"
+export VIRTUAL_ENV
+
+_OLD_VIRTUAL_PATH="$PATH"
+PATH="$VIRTUAL_ENV/bin:$PATH"
+export PATH
+
+# unset PYTHONHOME if set
+# this will fail if PYTHONHOME is set to the empty string (which is bad anyway)
+# could use `if (set -u; : $PYTHONHOME) ;` in bash
+if [ -n "${PYTHONHOME:-}" ] ; then
+    _OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}"
+    unset PYTHONHOME
+fi
+
+if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then
+    _OLD_VIRTUAL_PS1="${PS1:-}"
+    PS1="(venv) ${PS1:-}"
+    export PS1
+    VIRTUAL_ENV_PROMPT="(venv) "
+    export VIRTUAL_ENV_PROMPT
+fi
+
+# This should detect bash and zsh, which have a hash command that must
+# be called to get it to forget past commands.  Without forgetting
+# past commands the $PATH changes we made may not be respected
+if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
+    hash -r 2> /dev/null
+fi

venv/bin/activate.csh

@@ -0,0 +1,26 @@
+# This file must be used with "source bin/activate.csh" *from csh*.
+# You cannot run it directly.
+# Created by Davide Di Blasi <davidedb@gmail.com>.
+# Ported to Python 3.3 venv by Andrew Svetlov <andrew.svetlov@gmail.com>
+
+alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; unsetenv VIRTUAL_ENV_PROMPT; test "\!:*" != "nondestructive" && unalias deactivate'
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+setenv VIRTUAL_ENV "/home/klein/codeWS/Python3/chess/venv"
+
+set _OLD_VIRTUAL_PATH="$PATH"
+setenv PATH "$VIRTUAL_ENV/bin:$PATH"
+
+
+set _OLD_VIRTUAL_PROMPT="$prompt"
+
+if (! "$?VIRTUAL_ENV_DISABLE_PROMPT") then
+    set prompt = "(venv) $prompt"
+    setenv VIRTUAL_ENV_PROMPT "(venv) "
+endif
+
+alias pydoc python -m pydoc
+
+rehash

venv/bin/activate.fish

@@ -0,0 +1,69 @@
+# This file must be used with "source <venv>/bin/activate.fish" *from fish*
+# (https://fishshell.com/); you cannot run it directly.
+
+function deactivate  -d "Exit virtual environment and return to normal shell environment"
+    # reset old environment variables
+    if test -n "$_OLD_VIRTUAL_PATH"
+        set -gx PATH $_OLD_VIRTUAL_PATH
+        set -e _OLD_VIRTUAL_PATH
+    end
+    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
+        set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
+        set -e _OLD_VIRTUAL_PYTHONHOME
+    end
+
+    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
+        set -e _OLD_FISH_PROMPT_OVERRIDE
+        # prevents error when using nested fish instances (Issue #93858)
+        if functions -q _old_fish_prompt
+            functions -e fish_prompt
+            functions -c _old_fish_prompt fish_prompt
+            functions -e _old_fish_prompt
+        end
+    end
+
+    set -e VIRTUAL_ENV
+    set -e VIRTUAL_ENV_PROMPT
+    if test "$argv[1]" != "nondestructive"
+        # Self-destruct!
+        functions -e deactivate
+    end
+end
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+set -gx VIRTUAL_ENV "/home/klein/codeWS/Python3/chess/venv"
+
+set -gx _OLD_VIRTUAL_PATH $PATH
+set -gx PATH "$VIRTUAL_ENV/bin" $PATH
+
+# Unset PYTHONHOME if set.
+if set -q PYTHONHOME
+    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
+    set -e PYTHONHOME
+end
+
+if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
+    # fish uses a function instead of an env var to generate the prompt.
+
+    # Save the current fish_prompt function as the function _old_fish_prompt.
+    functions -c fish_prompt _old_fish_prompt
+
+    # With the original prompt function renamed, we can override with our own.
+    function fish_prompt
+        # Save the return status of the last command.
+        set -l old_status $status
+
+        # Output the venv prompt; color taken from the blue of the Python logo.
+        printf "%s%s%s" (set_color 4B8BBE) "(venv) " (set_color normal)
+
+        # Restore the return status of the previous command.
+        echo "exit $old_status" | .
+        # Output the original/"old" prompt.
+        _old_fish_prompt
+    end
+
+    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
+    set -gx VIRTUAL_ENV_PROMPT "(venv) "
+end

venv/bin/pip

@@ -0,0 +1,8 @@
+#!/home/klein/codeWS/Python3/chess/venv/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())

venv/bin/pip3

@@ -0,0 +1,8 @@
+#!/home/klein/codeWS/Python3/chess/venv/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())

venv/bin/pip3.11

@@ -0,0 +1,8 @@
+#!/home/klein/codeWS/Python3/chess/venv/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())

venv/bin/python

@@ -0,0 +1 @@
+python3

venv/bin/python3

@@ -0,0 +1 @@
+/usr/bin/python3

venv/bin/python3.11

@@ -0,0 +1 @@
+python3

venv/lib/python3.11/site-packages/_distutils_hack/__init__.py

@@ -0,0 +1,222 @@
+# don't import any costly modules
+import sys
+import os
+
+
+is_pypy = '__pypy__' in sys.builtin_module_names
+
+
+def warn_distutils_present():
+    if 'distutils' not in sys.modules:
+        return
+    if is_pypy and sys.version_info < (3, 7):
+        # PyPy for 3.6 unconditionally imports distutils, so bypass the warning
+        # https://foss.heptapod.net/pypy/pypy/-/blob/be829135bc0d758997b3566062999ee8b23872b4/lib-python/3/site.py#L250
+        return
+    import warnings
+
+    warnings.warn(
+        "Distutils was imported before Setuptools, but importing Setuptools "
+        "also replaces the `distutils` module in `sys.modules`. This may lead "
+        "to undesirable behaviors or errors. To avoid these issues, avoid "
+        "using distutils directly, ensure that setuptools is installed in the "
+        "traditional way (e.g. not an editable install), and/or make sure "
+        "that setuptools is always imported before distutils."
+    )
+
+
+def clear_distutils():
+    if 'distutils' not in sys.modules:
+        return
+    import warnings
+
+    warnings.warn("Setuptools is replacing distutils.")
+    mods = [
+        name
+        for name in sys.modules
+        if name == "distutils" or name.startswith("distutils.")
+    ]
+    for name in mods:
+        del sys.modules[name]
+
+
+def enabled():
+    """
+    Allow selection of distutils by environment variable.
+    """
+    which = os.environ.get('SETUPTOOLS_USE_DISTUTILS', 'local')
+    return which == 'local'
+
+
+def ensure_local_distutils():
+    import importlib
+
+    clear_distutils()
+
+    # With the DistutilsMetaFinder in place,
+    # perform an import to cause distutils to be
+    # loaded from setuptools._distutils. Ref #2906.
+    with shim():
+        importlib.import_module('distutils')
+
+    # check that submodules load as expected
+    core = importlib.import_module('distutils.core')
+    assert '_distutils' in core.__file__, core.__file__
+    assert 'setuptools._distutils.log' not in sys.modules
+
+
+def do_override():
+    """
+    Ensure that the local copy of distutils is preferred over stdlib.
+
+    See https://github.com/pypa/setuptools/issues/417#issuecomment-392298401
+    for more motivation.
+    """
+    if enabled():
+        warn_distutils_present()
+        ensure_local_distutils()
+
+
+class _TrivialRe:
+    def __init__(self, *patterns):
+        self._patterns = patterns
+
+    def match(self, string):
+        return all(pat in string for pat in self._patterns)
+
+
+class DistutilsMetaFinder:
+    def find_spec(self, fullname, path, target=None):
+        # optimization: only consider top level modules and those
+        # found in the CPython test suite.
+        if path is not None and not fullname.startswith('test.'):
+            return
+
+        method_name = 'spec_for_{fullname}'.format(**locals())
+        method = getattr(self, method_name, lambda: None)
+        return method()
+
+    def spec_for_distutils(self):
+        if self.is_cpython():
+            return
+
+        import importlib
+        import importlib.abc
+        import importlib.util
+
+        try:
+            mod = importlib.import_module('setuptools._distutils')
+        except Exception:
+            # There are a couple of cases where setuptools._distutils
+            # may not be present:
+            # - An older Setuptools without a local distutils is
+            #   taking precedence. Ref #2957.
+            # - Path manipulation during sitecustomize removes
+            #   setuptools from the path but only after the hook
+            #   has been loaded. Ref #2980.
+            # In either case, fall back to stdlib behavior.
+            return
+
+        class DistutilsLoader(importlib.abc.Loader):
+            def create_module(self, spec):
+                mod.__name__ = 'distutils'
+                return mod
+
+            def exec_module(self, module):
+                pass
+
+        return importlib.util.spec_from_loader(
+            'distutils', DistutilsLoader(), origin=mod.__file__
+        )
+
+    @staticmethod
+    def is_cpython():
+        """
+        Suppress supplying distutils for CPython (build and tests).
+        Ref #2965 and #3007.
+        """
+        return os.path.isfile('pybuilddir.txt')
+
+    def spec_for_pip(self):
+        """
+        Ensure stdlib distutils when running under pip.
+        See pypa/pip#8761 for rationale.
+        """
+        if self.pip_imported_during_build():
+            return
+        clear_distutils()
+        self.spec_for_distutils = lambda: None
+
+    @classmethod
+    def pip_imported_during_build(cls):
+        """
+        Detect if pip is being imported in a build script. Ref #2355.
+        """
+        import traceback
+
+        return any(
+            cls.frame_file_is_setup(frame) for frame, line in traceback.walk_stack(None)
+        )
+
+    @staticmethod
+    def frame_file_is_setup(frame):
+        """
+        Return True if the indicated frame suggests a setup.py file.
+        """
+        # some frames may not have __file__ (#2940)
+        return frame.f_globals.get('__file__', '').endswith('setup.py')
+
+    def spec_for_sensitive_tests(self):
+        """
+        Ensure stdlib distutils when running select tests under CPython.
+
+        python/cpython#91169
+        """
+        clear_distutils()
+        self.spec_for_distutils = lambda: None
+
+    sensitive_tests = (
+        [
+            'test.test_distutils',
+            'test.test_peg_generator',
+            'test.test_importlib',
+        ]
+        if sys.version_info < (3, 10)
+        else [
+            'test.test_distutils',
+        ]
+    )
+
+
+for name in DistutilsMetaFinder.sensitive_tests:
+    setattr(
+        DistutilsMetaFinder,
+        f'spec_for_{name}',
+        DistutilsMetaFinder.spec_for_sensitive_tests,
+    )
+
+
+DISTUTILS_FINDER = DistutilsMetaFinder()
+
+
+def add_shim():
+    DISTUTILS_FINDER in sys.meta_path or insert_shim()
+
+
+class shim:
+    def __enter__(self):
+        insert_shim()
+
+    def __exit__(self, exc, value, tb):
+        remove_shim()
+
+
+def insert_shim():
+    sys.meta_path.insert(0, DISTUTILS_FINDER)
+
+
+def remove_shim():
+    try:
+        sys.meta_path.remove(DISTUTILS_FINDER)
+    except ValueError:
+        pass

venv/lib/python3.11/site-packages/_distutils_hack/override.py

@@ -0,0 +1 @@
+__import__('_distutils_hack').do_override()

venv/lib/python3.11/site-packages/chess-1.10.0.dist-info/AUTHORS

@@ -0,0 +1,163 @@
+# List of authors for Stockfish, as of January 7, 2020
+
+Tord Romstad (romstad)
+Marco Costalba (mcostalba)
+Joona Kiiski (zamar)
+Gary Linscott (glinscott)
+
+Aditya (absimaldata)
+Adrian Petrescu (apetresc)
+Ajith Chandy Jose (ajithcj)
+Alain Savard (Rocky640)
+Alayan Feh (Alayan-stk-2)
+Alexander Kure
+Alexander Pagel (Lolligerhans)
+Ali AlZhrani (Cooffe)
+Andrew Grant (AndyGrant)
+Andrey Neporada (nepal)
+Andy Duplain
+Aram Tumanian (atumanian)
+Arjun Temurnikar
+Auguste Pop
+Balint Pfliegel
+Ben Koshy (BKSpurgeon)
+Bill Henry (VoyagerOne)
+Bojun Guo (noobpwnftw, Nooby)
+braich
+Brian Sheppard (SapphireBrand, briansheppard-toast)
+Bryan Cross (crossbr)
+candirufish
+Chess13234
+Chris Cain (ceebo)
+Dan Schmidt (dfannius)
+Daniel Axtens (daxtens)
+Daniel Dugovic (ddugovic)
+Dariusz Orzechowski
+David Zar
+Daylen Yang (daylen)
+DiscanX
+double-beep
+Eduardo Cáceres (eduherminio)
+Eelco de Groot (KingDefender)
+Elvin Liu (solarlight2)
+erbsenzaehler
+Ernesto Gatti
+Fabian Beuke (madnight)
+Fabian Fichter (ianfab)
+fanon
+Fauzi Akram Dabat (FauziAkram)
+Felix Wittmann
+gamander
+gguliash
+Gian-Carlo Pascutto (gcp)
+Gontran Lemaire (gonlem)
+Goodkov Vasiliy Aleksandrovich (goodkov)
+Gregor Cramer
+GuardianRM
+Günther Demetz (pb00067, pb00068)
+Guy Vreuls (gvreuls)
+Henri Wiechers
+Hiraoka Takuya (HiraokaTakuya)
+homoSapiensSapiens
+Hongzhi Cheng
+Ivan Ivec (IIvec)
+Jacques B. (Timshel)
+Jan Ondruš (hxim)
+Jared Kish (Kurtbusch)
+Jarrod Torriero (DU-jdto)
+Jean Gauthier (OuaisBla)
+Jean-Francois Romang (jromang)
+Jekaa
+Jerry Donald Watson (jerrydonaldwatson)
+Jonathan Calovski (Mysseno)
+Jonathan Dumale (SFisGOD)
+Joost VandeVondele (vondele)
+Jörg Oster (joergoster)
+Joseph Ellis (jhellis3)
+Joseph R. Prostko
+jundery
+Justin Blanchard (UncombedCoconut)
+Kelly Wilson
+Ken Takusagawa
+kinderchocolate
+Kiran Panditrao (Krgp)
+Kojirion
+Leonardo Ljubičić (ICCF World Champion)
+Leonid Pechenik (lp--)
+Linus Arver (listx)
+loco-loco
+Lub van den Berg (ElbertoOne)
+Luca Brivio (lucabrivio)
+Lucas Braesch (lucasart)
+Lyudmil Antonov (lantonov)
+Maciej Żenczykowski (zenczykowski)
+Malcolm Campbell (xoto10)
+Mark Tenzer (31m059)
+marotear
+Matthew Lai (matthewlai)
+Matthew Sullivan (Matt14916)
+Michael An (man)
+Michael Byrne (MichaelB7)
+Michael Chaly (Vizvezdenec)
+Michael Stembera (mstembera)
+Michael Whiteley (protonspring)
+Michel Van den Bergh (vdbergh)
+Miguel Lahoz (miguel-l)
+Mikael Bäckman (mbootsector)
+Mira
+Miroslav Fontán (Hexik)
+Moez Jellouli (MJZ1977)
+Mohammed Li (tthsqe12)
+Nathan Rugg (nmrugg)
+Nick Pelling (nickpelling)
+Nicklas Persson (NicklasPersson)
+Niklas Fiekas (niklasf)
+Nikolay Kostov (NikolayIT)
+Ondrej Mosnáček (WOnder93)
+Oskar Werkelin Ahlin
+Pablo Vazquez
+Panthee
+Pascal Romaret
+Pasquale Pigazzini (ppigazzini)
+Patrick Jansen (mibere)
+pellanda
+Peter Zsifkovits (CoffeeOne)
+Ralph Stößer (Ralph Stoesser)
+Raminder Singh
+renouve
+Reuven Peleg
+Richard Lloyd
+Rodrigo Exterckötter Tjäder
+Ron Britvich (Britvich)
+Ronald de Man (syzygy1, syzygy)
+Ryan Schmitt
+Ryan Takker
+Sami Kiminki (skiminki)
+Sebastian Buchwald (UniQP)
+Sergei Antonov (saproj)
+Sergei Ivanov (svivanov72)
+sf-x
+Shane Booth (shane31)
+Stefan Geschwentner (locutus2)
+Stefano Cardanobile (Stefano80)
+Steinar Gunderson (sesse)
+Stéphane Nicolet (snicolet)
+Thanar2
+thaspel
+theo77186
+Tom Truscott
+Tom Vijlbrief (tomtor)
+Torsten Franz (torfranz, tfranzer)
+Tracey Emery (basepr1me)
+Uri Blass (uriblass)
+Vince Negri (cuddlestmonkey)
+
+
+# Additionally, we acknowledge the authors and maintainers of fishtest,
+# an amazing and essential framework for the development of Stockfish!
+#
+# https://github.com/glinscott/fishtest/blob/master/AUTHORS
+
+
+
+

venv/lib/python3.11/site-packages/chess-1.10.0.dist-info/INSTALLER

@@ -0,0 +1 @@
+pip

venv/lib/python3.11/site-packages/chess-1.10.0.dist-info/LICENSE.txt

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
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venv/lib/python3.11/site-packages/chess-1.10.0.dist-info/METADATA

@@ -0,0 +1,405 @@
+Metadata-Version: 2.1
+Name: chess
+Version: 1.10.0
+Summary: A chess library with move generation and validation, Polyglot opening book probing, PGN reading and writing, Gaviota tablebase probing, Syzygy tablebase probing, and XBoard/UCI engine communication.
+Home-page: https://github.com/niklasf/python-chess
+Author: Niklas Fiekas
+Author-email: niklas.fiekas@backscattering.de
+License: GPL-3.0+
+Project-URL: Documentation, https://python-chess.readthedocs.io
+Keywords: chess fen epd pgn polyglot syzygy gaviota uci xboard
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: Intended Audience :: Science/Research
+Classifier: License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python :: 3 :: Only
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
+Classifier: Topic :: Games/Entertainment :: Board Games
+Classifier: Topic :: Games/Entertainment :: Turn Based Strategy
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Classifier: Typing :: Typed
+Obsoletes: python_chess
+Requires-Python: >=3.7
+Description-Content-Type: text/x-rst
+License-File: LICENSE.txt
+License-File: AUTHORS
+
+python-chess: a chess library for Python
+========================================
+
+.. image:: https://github.com/niklasf/python-chess/workflows/Test/badge.svg
+    :target: https://github.com/niklasf/python-chess/actions
+    :alt: Test status
+
+.. image:: https://badge.fury.io/py/chess.svg
+    :target: https://pypi.python.org/pypi/chess
+    :alt: PyPI package
+
+.. image:: https://readthedocs.org/projects/python-chess/badge/?version=v1.10.0
+    :target: https://python-chess.readthedocs.io/en/v1.10.0/
+    :alt: Docs
+
+.. image:: https://badges.gitter.im/python-chess/community.svg
+    :target: https://gitter.im/python-chess/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge
+    :alt: Chat on Gitter
+
+Introduction
+------------
+
+python-chess is a chess library for Python, with move generation,
+move validation, and support for common formats. This is the Scholar's mate in
+python-chess:
+
+.. code:: python
+
+    >>> import chess
+
+    >>> board = chess.Board()
+
+    >>> board.legal_moves
+    <LegalMoveGenerator at ... (Nh3, Nf3, Nc3, Na3, h3, g3, f3, e3, d3, c3, ...)>
+    >>> chess.Move.from_uci("a8a1") in board.legal_moves
+    False
+
+    >>> board.push_san("e4")
+    Move.from_uci('e2e4')
+    >>> board.push_san("e5")
+    Move.from_uci('e7e5')
+    >>> board.push_san("Qh5")
+    Move.from_uci('d1h5')
+    >>> board.push_san("Nc6")
+    Move.from_uci('b8c6')
+    >>> board.push_san("Bc4")
+    Move.from_uci('f1c4')
+    >>> board.push_san("Nf6")
+    Move.from_uci('g8f6')
+    >>> board.push_san("Qxf7")
+    Move.from_uci('h5f7')
+
+    >>> board.is_checkmate()
+    True
+
+    >>> board
+    Board('r1bqkb1r/pppp1Qpp/2n2n2/4p3/2B1P3/8/PPPP1PPP/RNB1K1NR b KQkq - 0 4')
+
+Installing
+----------
+
+Requires Python 3.7+. Download and install the latest release:
+
+::
+
+    pip install chess
+
+
+`Documentation <https://python-chess.readthedocs.io/en/v1.10.0/>`__
+--------------------------------------------------------------------
+
+* `Core <https://python-chess.readthedocs.io/en/v1.10.0/core.html>`_
+* `PGN parsing and writing <https://python-chess.readthedocs.io/en/v1.10.0/pgn.html>`_
+* `Polyglot opening book reading <https://python-chess.readthedocs.io/en/v1.10.0/polyglot.html>`_
+* `Gaviota endgame tablebase probing <https://python-chess.readthedocs.io/en/v1.10.0/gaviota.html>`_
+* `Syzygy endgame tablebase probing <https://python-chess.readthedocs.io/en/v1.10.0/syzygy.html>`_
+* `UCI/XBoard engine communication <https://python-chess.readthedocs.io/en/v1.10.0/engine.html>`_
+* `Variants <https://python-chess.readthedocs.io/en/v1.10.0/variant.html>`_
+* `Changelog <https://python-chess.readthedocs.io/en/v1.10.0/changelog.html>`_
+
+Features
+--------
+
+* Includes mypy typings.
+
+* IPython/Jupyter Notebook integration.
+  `SVG rendering docs <https://python-chess.readthedocs.io/en/v1.10.0/svg.html>`_.
+
+  .. code:: python
+
+      >>> board
+
+  .. image:: https://backscattering.de/web-boardimage/board.png?fen=r1bqkb1r/pppp1Qpp/2n2n2/4p3/2B1P3/8/PPPP1PPP/RNB1K1NR&lastmove=h5f7&check=e8
+      :alt: r1bqkb1r/pppp1Qpp/2n2n2/4p3/2B1P3/8/PPPP1PPP/RNB1K1NR
+
+* Chess variants: Standard, Chess960, Suicide, Giveaway, Atomic,
+  King of the Hill, Racing Kings, Horde, Three-check, Crazyhouse.
+  `Variant docs <https://python-chess.readthedocs.io/en/v1.10.0/variant.html>`_.
+
+* Make and unmake moves.
+
+  .. code:: python
+
+      >>> Nf3 = chess.Move.from_uci("g1f3")
+      >>> board.push(Nf3)  # Make the move
+
+      >>> board.pop()  # Unmake the last move
+      Move.from_uci('g1f3')
+
+* Show a simple ASCII board.
+
+  .. code:: python
+
+      >>> board = chess.Board("r1bqkb1r/pppp1Qpp/2n2n2/4p3/2B1P3/8/PPPP1PPP/RNB1K1NR b KQkq - 0 4")
+      >>> print(board)
+      r . b q k b . r
+      p p p p . Q p p
+      . . n . . n . .
+      . . . . p . . .
+      . . B . P . . .
+      . . . . . . . .
+      P P P P . P P P
+      R N B . K . N R
+
+* Detects checkmates, stalemates and draws by insufficient material.
+
+  .. code:: python
+
+      >>> board.is_stalemate()
+      False
+      >>> board.is_insufficient_material()
+      False
+      >>> board.outcome()
+      Outcome(termination=<Termination.CHECKMATE: 1>, winner=True)
+
+* Detects repetitions. Has a half-move clock.
+
+  .. code:: python
+
+      >>> board.can_claim_threefold_repetition()
+      False
+      >>> board.halfmove_clock
+      0
+      >>> board.can_claim_fifty_moves()
+      False
+      >>> board.can_claim_draw()
+      False
+
+  With the new rules from July 2014, a game ends as a draw (even without a
+  claim) once a fivefold repetition occurs or if there are 75 moves without
+  a pawn push or capture. Other ways of ending a game take precedence.
+
+  .. code:: python
+
+      >>> board.is_fivefold_repetition()
+      False
+      >>> board.is_seventyfive_moves()
+      False
+
+* Detects checks and attacks.
+
+  .. code:: python
+
+      >>> board.is_check()
+      True
+      >>> board.is_attacked_by(chess.WHITE, chess.E8)
+      True
+
+      >>> attackers = board.attackers(chess.WHITE, chess.F3)
+      >>> attackers
+      SquareSet(0x0000_0000_0000_4040)
+      >>> chess.G2 in attackers
+      True
+      >>> print(attackers)
+      . . . . . . . .
+      . . . . . . . .
+      . . . . . . . .
+      . . . . . . . .
+      . . . . . . . .
+      . . . . . . . .
+      . . . . . . 1 .
+      . . . . . . 1 .
+
+* Parses and creates SAN representation of moves.
+
+  .. code:: python
+
+      >>> board = chess.Board()
+      >>> board.san(chess.Move(chess.E2, chess.E4))
+      'e4'
+      >>> board.parse_san('Nf3')
+      Move.from_uci('g1f3')
+      >>> board.variation_san([chess.Move.from_uci(m) for m in ["e2e4", "e7e5", "g1f3"]])
+      '1. e4 e5 2. Nf3'
+
+* Parses and creates FENs, extended FENs and Shredder FENs.
+
+  .. code:: python
+
+      >>> board.fen()
+      'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1'
+      >>> board.shredder_fen()
+      'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w HAha - 0 1'
+      >>> board = chess.Board("8/8/8/2k5/4K3/8/8/8 w - - 4 45")
+      >>> board.piece_at(chess.C5)
+      Piece.from_symbol('k')
+
+* Parses and creates EPDs.
+
+  .. code:: python
+
+      >>> board = chess.Board()
+      >>> board.epd(bm=board.parse_uci("d2d4"))
+      'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - bm d4;'
+
+      >>> ops = board.set_epd("1k1r4/pp1b1R2/3q2pp/4p3/2B5/4Q3/PPP2B2/2K5 b - - bm Qd1+; id \"BK.01\";")
+      >>> ops == {'bm': [chess.Move.from_uci('d6d1')], 'id': 'BK.01'}
+      True
+
+* Detects `absolute pins and their directions <https://python-chess.readthedocs.io/en/v1.10.0/core.html#chess.Board.pin>`_.
+
+* Reads Polyglot opening books.
+  `Docs <https://python-chess.readthedocs.io/en/v1.10.0/polyglot.html>`__.
+
+  .. code:: python
+
+      >>> import chess.polyglot
+
+      >>> book = chess.polyglot.open_reader("data/polyglot/performance.bin")
+
+      >>> board = chess.Board()
+      >>> main_entry = book.find(board)
+      >>> main_entry.move
+      Move.from_uci('e2e4')
+      >>> main_entry.weight
+      1
+
+      >>> book.close()
+
+* Reads and writes PGNs. Supports headers, comments, NAGs and a tree of
+  variations.
+  `Docs <https://python-chess.readthedocs.io/en/v1.10.0/pgn.html>`__.
+
+  .. code:: python
+
+      >>> import chess.pgn
+
+      >>> with open("data/pgn/molinari-bordais-1979.pgn") as pgn:
+      ...     first_game = chess.pgn.read_game(pgn)
+
+      >>> first_game.headers["White"]
+      'Molinari'
+      >>> first_game.headers["Black"]
+      'Bordais'
+
+      >>> first_game.mainline()
+      <Mainline at ... (1. e4 c5 2. c4 Nc6 3. Ne2 Nf6 4. Nbc3 Nb4 5. g3 Nd3#)>
+
+      >>> first_game.headers["Result"]
+      '0-1'
+
+* Probe Gaviota endgame tablebases (DTM, WDL).
+  `Docs <https://python-chess.readthedocs.io/en/v1.10.0/gaviota.html>`__.
+
+* Probe Syzygy endgame tablebases (DTZ, WDL).
+  `Docs <https://python-chess.readthedocs.io/en/v1.10.0/syzygy.html>`__.
+
+  .. code:: python
+
+      >>> import chess.syzygy
+
+      >>> tablebase = chess.syzygy.open_tablebase("data/syzygy/regular")
+
+      >>> # Black to move is losing in 53 half moves (distance to zero) in this
+      >>> # KNBvK endgame.
+      >>> board = chess.Board("8/2K5/4B3/3N4/8/8/4k3/8 b - - 0 1")
+      >>> tablebase.probe_dtz(board)
+      -53
+
+      >>> tablebase.close()
+
+* Communicate with UCI/XBoard engines. Based on ``asyncio``.
+  `Docs <https://python-chess.readthedocs.io/en/v1.10.0/engine.html>`__.
+
+  .. code:: python
+
+      >>> import chess.engine
+
+      >>> engine = chess.engine.SimpleEngine.popen_uci("stockfish")
+
+      >>> board = chess.Board("1k1r4/pp1b1R2/3q2pp/4p3/2B5/4Q3/PPP2B2/2K5 b - - 0 1")
+      >>> limit = chess.engine.Limit(time=2.0)
+      >>> engine.play(board, limit)
+      <PlayResult at ... (move=d6d1, ponder=c1d1, info={...}, draw_offered=False, resigned=False)>
+
+      >>> engine.quit()
+
+Selected projects
+-----------------
+
+If you like, share interesting things you are using python-chess for, for example:
+
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true       | https://syzygy-tables.info/                                                                  |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: https://syzygy-tables.info/                                                             | A website to probe Syzygy endgame tablebases                                                 |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/maia.png?raw=true         | https://maiachess.com/                                                                       |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: https://maiachess.com/                                                                  | A human-like neural network chess engine                                                     |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | `clente/chess <https://github.com/clente/chess>`_                                            |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: https://github.com/clente/chess                                                         | Oppinionated wrapper to use python-chess from the R programming language                     |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true     | https://crazyara.org/                                                                        |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: https://crazyara.org/                                                                   | Deep learning for Crazyhouse                                                                 |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true      | `http://johncheetham.com <http://johncheetham.com/projects/jcchess/>`_                       |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: http://johncheetham.com/projects/jcchess/                                               | A GUI to play against UCI chess engines                                                      |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true   | `https://pettingzoo.farama.org <https://pettingzoo.farama.org/environments/classic/chess/>`_ |
+|     :width: 64                                                                                       |                                                                                              |
+|     :height: 64                                                                                      |                                                                                              |
+|     :target: https://pettingzoo.farama.org/environments/classic/chess/                               | A multi-agent reinforcement learning environment                                             |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/cli-chess.png?raw=true    | `cli-chess <https://github.com/trevorbayless/cli-chess>`_                                    |
+|     :width: 64                                                                                       |                                                                                              |
+|     :height: 64                                                                                      |                                                                                              |
+|     :target: https://github.com/trevorbayless/cli-chess                                              | A highly customizable way to play chess in your terminal                                     |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+
+* extensions to build engines (search and evaluation) – https://github.com/Mk-Chan/python-chess-engine-extensions
+* a stand-alone chess computer based on DGT board – http://www.picochess.org/
+* a bridge between Lichess API and chess engines – https://github.com/careless25/lichess-bot
+* a command-line PGN annotator – https://github.com/rpdelaney/python-chess-annotator
+* an HTTP microservice to render board images – https://github.com/niklasf/web-boardimage
+* building a toy chess engine with alpha-beta pruning, piece-square tables, and move ordering – https://healeycodes.com/building-my-own-chess-engine/
+* a JIT compiled chess engine – https://github.com/SamRagusa/Batch-First
+* teaching Cognitive Science – `https://jupyter.brynmawr.edu <https://jupyter.brynmawr.edu/services/public/dblank/CS371%20Cognitive%20Science/2016-Fall/Programming%20a%20Chess%20Player.ipynb>`_
+* an `Alexa skill to play blindfold chess <https://www.amazon.com/Laynr-blindfold-chess/dp/B0859QF8YL>`_ – https://github.com/laynr/blindfold-chess
+* a chessboard widget for PySide2 – https://github.com/H-a-y-k/hichesslib
+* Django Rest Framework API for multiplayer chess – https://github.com/WorkShoft/capablanca-api
+* a `browser based PGN viewer <https://about.nmstoker.com/chess2.html>`_ written in PyScript – https://github.com/nmstoker/ChessMatchViewer
+* an accessible chessboard that allows blind and visually impaired  players  to play chess against Stockfish – https://github.com/blindpandas/chessmart
+
+
+Acknowledgements
+----------------
+
+Thanks to the Stockfish authors and thanks to Sam Tannous for publishing his
+approach to `avoid rotated bitboards with direct lookup (PDF) <http://arxiv.org/pdf/0704.3773.pdf>`_
+alongside his GPL2+ engine `Shatranj <https://github.com/stannous/shatranj>`_.
+Some move generation ideas are taken from these sources.
+
+Thanks to Ronald de Man for his
+`Syzygy endgame tablebases <https://github.com/syzygy1/tb>`_.
+The probing code in python-chess is very directly ported from his C probing code.
+
+Thanks to `Kristian Glass <https://github.com/doismellburning>`_ for
+transferring the namespace ``chess`` on PyPI.
+
+License
+-------
+
+python-chess is licensed under the GPL 3 (or any later version at your option).
+Check out LICENSE.txt for the full text.

venv/lib/python3.11/site-packages/chess-1.10.0.dist-info/RECORD

@@ -0,0 +1,27 @@
+chess-1.10.0.dist-info/AUTHORS,sha256=71TqoAOXyf-F2T8AcUNaoYf3kkW53hKXAXQ0KMJUfYY,3564
+chess-1.10.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+chess-1.10.0.dist-info/LICENSE.txt,sha256=jOtLnuWt7d5Hsx6XXB2QxzrSe2sWWh3NgMfFRetluQM,35147
+chess-1.10.0.dist-info/METADATA,sha256=IYcrcjP5Wkaai5AyweFfk2ljhZasQ3-mZirBrHj_hAA,19766
+chess-1.10.0.dist-info/RECORD,,
+chess-1.10.0.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+chess-1.10.0.dist-info/WHEEL,sha256=pkctZYzUS4AYVn6dJ-7367OJZivF2e8RA9b_ZBjif18,92
+chess-1.10.0.dist-info/top_level.txt,sha256=KQh_dmhsO-MtGPgCihpBa-q5XF6tGfA9_MKDXETuyss,6
+chess/__init__.py,sha256=DOLml3zGP_txy9osquR31T-SYvO-IAkepxWOIg9eRfI,147552
+chess/__pycache__/__init__.cpython-311.pyc,,
+chess/__pycache__/_interactive.cpython-311.pyc,,
+chess/__pycache__/engine.cpython-311.pyc,,
+chess/__pycache__/gaviota.cpython-311.pyc,,
+chess/__pycache__/pgn.cpython-311.pyc,,
+chess/__pycache__/polyglot.cpython-311.pyc,,
+chess/__pycache__/svg.cpython-311.pyc,,
+chess/__pycache__/syzygy.cpython-311.pyc,,
+chess/__pycache__/variant.cpython-311.pyc,,
+chess/_interactive.py,sha256=UmmPtGF3owMS4jGOSxXGVk4Bs2RLc_aqICZwA7qe4s4,5843
+chess/engine.py,sha256=73aDNEaHJPW4frGHvcEfoST2x7qVFi4n7TeRI6kXqcM,129781
+chess/gaviota.py,sha256=FHkFZ_7Lm20oL4iOSbRTecC0xzM8QxCbNZ1Qc6oENYQ,63004
+chess/pgn.py,sha256=NDThgqgP2N_pqg86iuRwVOrxTISWMUfurKX4RJXCHmM,58783
+chess/polyglot.py,sha256=jtu8_sdFLcLIjnpe0sv0Vjw_n3bKwbBcGdBWK0Mz_nE,28093
+chess/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+chess/svg.py,sha256=8tBkoF1uCb_bchboVe8lYaSLSuIwsfSOMbgTEf_yw0Y,33835
+chess/syzygy.py,sha256=7C9cpDhR7HKY8oy_zXr5uL0G4-Dw4u9pklS4z0NC6vk,69605
+chess/variant.py,sha256=EqLZs3cUmoEuafsQj97gzPU5IQhppnlo3wTVfsFzqyM,46048

venv/lib/python3.11/site-packages/chess-1.10.0.dist-info/WHEEL

@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.40.0)
+Root-Is-Purelib: true
+Tag: py3-none-any
+

venv/lib/python3.11/site-packages/chess-1.10.0.dist-info/top_level.txt

@@ -0,0 +1 @@
+chess

venv/lib/python3.11/site-packages/chess/_interactive.py

@@ -0,0 +1,190 @@
+# TODO: Fix typing in this file.
+# mypy: ignore-errors
+
+import chess.svg
+
+
+class WidgetError(Exception):
+    """
+    raised when ipywidgets is not installed
+    """
+
+
+class NotJupyter(Exception):
+    """
+    raised when InteractiveViewer is instantiated from a non jupyter shell
+    """
+
+
+try:
+    from ipywidgets import Button, GridBox, Layout, HTML, Output, HBox, Select
+    from IPython.display import display, clear_output
+except ModuleNotFoundError:
+    raise WidgetError("You need to have ipywidgets installed and running from Jupyter")
+
+
+class InteractiveViewer:
+    def __new__(cls, game):
+        jupyter = True
+        try:
+            if get_ipython().__class__.__name__ != "ZMQInteractiveShell":
+                jupyter = False
+        except NameError:
+            jupyter = False
+
+        if not jupyter:
+            raise NotJupyter("The interactive viewer only runs in Jupyter shell")
+
+        return object.__new__(cls)
+
+    def __init__(self, game):
+        self.game = game
+        self.__board = game.board()
+        self.__moves = list(game.mainline_moves())
+        self.__white_moves = [str(move) for (i, move) in enumerate(self.__moves) if i % 2 == 0]
+        self.__black_moves = [str(move) for (i, move) in enumerate(self.__moves) if i % 2 == 1]
+        self.__move_list_len = len(self.__white_moves)
+        self.__num_moves = len(self.__moves)
+        self.__next_move = 0 if self.__moves else None
+        self.__out = Output()
+
+    def __next_click(self, _):
+        move = self.__moves[self.__next_move]
+        self.__next_move += 1
+        self.__board.push(move)
+        self.show()
+
+    def __prev_click(self, _):
+        self.__board.pop()
+        self.__next_move -= 1
+        self.show()
+
+    def __reset_click(self, _):
+        self.__board.reset()
+        self.__next_move = 0
+        self.show()
+
+    def __white_select_change(self, change):
+        new = change["new"]
+        if (isinstance(new, dict)) and ("index" in new):
+            target = new["index"] * 2
+            self.__seek(target)
+            self.show()
+
+    def __black_select_change(self, change):
+        new = change["new"]
+        if (isinstance(new, dict)) and ("index" in new):
+            target = new["index"] * 2 + 1
+            self.__seek(target)
+            self.show()
+
+    def __seek(self, target):
+        while self.__next_move <= target:
+            move = self.__moves[self.__next_move]
+            self.__next_move += 1
+            self.__board.push(move)
+
+        while self.__next_move > target + 1:
+            self.__board.pop()
+            self.__next_move -= 1
+
+    def show(self):
+        display(self.__out)
+        next_move = Button(
+            icon="step-forward",
+            layout=Layout(width="60px", grid_area="right"),
+            disabled=self.__next_move >= self.__num_moves,
+        )
+
+        prev_move = Button(
+            icon="step-backward",
+            layout=Layout(width="60px", grid_area="left"),
+            disabled=self.__next_move == 0,
+        )
+
+        reset = Button(
+            icon="stop",
+            layout=Layout(width="60px", grid_area="middle"),
+            disabled=self.__next_move == 0,
+        )
+
+        if self.__next_move == 0:
+            white_move = None
+            black_move = None
+        else:
+            white_move = (
+                self.__white_moves[self.__next_move // 2]
+                if (self.__next_move % 2) == 1
+                else None
+            )
+            black_move = (
+                self.__black_moves[self.__next_move // 2 - 1]
+                if (self.__next_move % 2) == 0
+                else None
+            )
+
+        white_move_list = Select(
+            options=self.__white_moves,
+            value=white_move,
+            rows=max(self.__move_list_len, 24),
+            disabled=False,
+            layout=Layout(width="80px"),
+        )
+
+        black_move_list = Select(
+            options=self.__black_moves,
+            value=black_move,
+            rows=max(self.__move_list_len, 24),
+            disabled=False,
+            layout=Layout(width="80px"),
+        )
+
+        white_move_list.observe(self.__white_select_change)
+        black_move_list.observe(self.__black_select_change)
+
+        move_number_width = 3 + len(str(self.__move_list_len)) * 10
+
+        move_number = Select(
+            options=range(1, self.__move_list_len + 1),
+            value=None,
+            disabled=True,
+            rows=max(self.__move_list_len, 24),
+            layout=Layout(width=f"{move_number_width}px"),
+        )
+
+        move_list = HBox(
+            [move_number, white_move_list, black_move_list],
+            layout=Layout(height="407px", grid_area="moves"),
+        )
+
+        next_move.on_click(self.__next_click)
+        prev_move.on_click(self.__prev_click)
+        reset.on_click(self.__reset_click)
+
+        with self.__out:
+            grid_box = GridBox(
+                children=[next_move, prev_move, reset, self.svg, move_list],
+                layout=Layout(
+                    width=f"{390+move_number_width+160}px",
+                    grid_template_rows="90% 10%",
+                    grid_template_areas="""
+                                "top top top top top moves"
+                                ". left middle right . moves"
+                                """,
+                ),
+            )
+            clear_output(wait=True)
+            display(grid_box)
+
+    @property
+    def svg(self) -> HTML:
+        svg = chess.svg.board(
+            board=self.__board,
+            size=390,
+            lastmove=self.__board.peek() if self.__board.move_stack else None,
+            check=self.__board.king(self.__board.turn)
+            if self.__board.is_check()
+            else None,
+        )
+        svg_widget = HTML(value=svg, layout=Layout(grid_area="top"))
+        return svg_widget

venv/lib/python3.11/site-packages/chess/polyglot.py

@@ -0,0 +1,535 @@
+# This file is part of the python-chess library.
+# Copyright (C) 2012-2021 Niklas Fiekas <niklas.fiekas@backscattering.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import annotations
+
+import chess
+import struct
+import os
+import mmap
+import random
+import typing
+
+from types import TracebackType
+from typing import Callable, Container, Iterator, List, NamedTuple, Optional, Type, Union
+
+
+PathLike = Union[str, bytes, os.PathLike]
+
+
+ENTRY_STRUCT = struct.Struct(">QHHI")
+
+
+POLYGLOT_RANDOM_ARRAY = [
+    0x9D39247E33776D41, 0x2AF7398005AAA5C7, 0x44DB015024623547, 0x9C15F73E62A76AE2,
+    0x75834465489C0C89, 0x3290AC3A203001BF, 0x0FBBAD1F61042279, 0xE83A908FF2FB60CA,
+    0x0D7E765D58755C10, 0x1A083822CEAFE02D, 0x9605D5F0E25EC3B0, 0xD021FF5CD13A2ED5,
+    0x40BDF15D4A672E32, 0x011355146FD56395, 0x5DB4832046F3D9E5, 0x239F8B2D7FF719CC,
+    0x05D1A1AE85B49AA1, 0x679F848F6E8FC971, 0x7449BBFF801FED0B, 0x7D11CDB1C3B7ADF0,
+    0x82C7709E781EB7CC, 0xF3218F1C9510786C, 0x331478F3AF51BBE6, 0x4BB38DE5E7219443,
+    0xAA649C6EBCFD50FC, 0x8DBD98A352AFD40B, 0x87D2074B81D79217, 0x19F3C751D3E92AE1,
+    0xB4AB30F062B19ABF, 0x7B0500AC42047AC4, 0xC9452CA81A09D85D, 0x24AA6C514DA27500,
+    0x4C9F34427501B447, 0x14A68FD73C910841, 0xA71B9B83461CBD93, 0x03488B95B0F1850F,
+    0x637B2B34FF93C040, 0x09D1BC9A3DD90A94, 0x3575668334A1DD3B, 0x735E2B97A4C45A23,
+    0x18727070F1BD400B, 0x1FCBACD259BF02E7, 0xD310A7C2CE9B6555, 0xBF983FE0FE5D8244,
+    0x9F74D14F7454A824, 0x51EBDC4AB9BA3035, 0x5C82C505DB9AB0FA, 0xFCF7FE8A3430B241,
+    0x3253A729B9BA3DDE, 0x8C74C368081B3075, 0xB9BC6C87167C33E7, 0x7EF48F2B83024E20,
+    0x11D505D4C351BD7F, 0x6568FCA92C76A243, 0x4DE0B0F40F32A7B8, 0x96D693460CC37E5D,
+    0x42E240CB63689F2F, 0x6D2BDCDAE2919661, 0x42880B0236E4D951, 0x5F0F4A5898171BB6,
+    0x39F890F579F92F88, 0x93C5B5F47356388B, 0x63DC359D8D231B78, 0xEC16CA8AEA98AD76,
+    0x5355F900C2A82DC7, 0x07FB9F855A997142, 0x5093417AA8A7ED5E, 0x7BCBC38DA25A7F3C,
+    0x19FC8A768CF4B6D4, 0x637A7780DECFC0D9, 0x8249A47AEE0E41F7, 0x79AD695501E7D1E8,
+    0x14ACBAF4777D5776, 0xF145B6BECCDEA195, 0xDABF2AC8201752FC, 0x24C3C94DF9C8D3F6,
+    0xBB6E2924F03912EA, 0x0CE26C0B95C980D9, 0xA49CD132BFBF7CC4, 0xE99D662AF4243939,
+    0x27E6AD7891165C3F, 0x8535F040B9744FF1, 0x54B3F4FA5F40D873, 0x72B12C32127FED2B,
+    0xEE954D3C7B411F47, 0x9A85AC909A24EAA1, 0x70AC4CD9F04F21F5, 0xF9B89D3E99A075C2,
+    0x87B3E2B2B5C907B1, 0xA366E5B8C54F48B8, 0xAE4A9346CC3F7CF2, 0x1920C04D47267BBD,
+    0x87BF02C6B49E2AE9, 0x092237AC237F3859, 0xFF07F64EF8ED14D0, 0x8DE8DCA9F03CC54E,
+    0x9C1633264DB49C89, 0xB3F22C3D0B0B38ED, 0x390E5FB44D01144B, 0x5BFEA5B4712768E9,
+    0x1E1032911FA78984, 0x9A74ACB964E78CB3, 0x4F80F7A035DAFB04, 0x6304D09A0B3738C4,
+    0x2171E64683023A08, 0x5B9B63EB9CEFF80C, 0x506AACF489889342, 0x1881AFC9A3A701D6,
+    0x6503080440750644, 0xDFD395339CDBF4A7, 0xEF927DBCF00C20F2, 0x7B32F7D1E03680EC,
+    0xB9FD7620E7316243, 0x05A7E8A57DB91B77, 0xB5889C6E15630A75, 0x4A750A09CE9573F7,
+    0xCF464CEC899A2F8A, 0xF538639CE705B824, 0x3C79A0FF5580EF7F, 0xEDE6C87F8477609D,
+    0x799E81F05BC93F31, 0x86536B8CF3428A8C, 0x97D7374C60087B73, 0xA246637CFF328532,
+    0x043FCAE60CC0EBA0, 0x920E449535DD359E, 0x70EB093B15B290CC, 0x73A1921916591CBD,
+    0x56436C9FE1A1AA8D, 0xEFAC4B70633B8F81, 0xBB215798D45DF7AF, 0x45F20042F24F1768,
+    0x930F80F4E8EB7462, 0xFF6712FFCFD75EA1, 0xAE623FD67468AA70, 0xDD2C5BC84BC8D8FC,
+    0x7EED120D54CF2DD9, 0x22FE545401165F1C, 0xC91800E98FB99929, 0x808BD68E6AC10365,
+    0xDEC468145B7605F6, 0x1BEDE3A3AEF53302, 0x43539603D6C55602, 0xAA969B5C691CCB7A,
+    0xA87832D392EFEE56, 0x65942C7B3C7E11AE, 0xDED2D633CAD004F6, 0x21F08570F420E565,
+    0xB415938D7DA94E3C, 0x91B859E59ECB6350, 0x10CFF333E0ED804A, 0x28AED140BE0BB7DD,
+    0xC5CC1D89724FA456, 0x5648F680F11A2741, 0x2D255069F0B7DAB3, 0x9BC5A38EF729ABD4,
+    0xEF2F054308F6A2BC, 0xAF2042F5CC5C2858, 0x480412BAB7F5BE2A, 0xAEF3AF4A563DFE43,
+    0x19AFE59AE451497F, 0x52593803DFF1E840, 0xF4F076E65F2CE6F0, 0x11379625747D5AF3,
+    0xBCE5D2248682C115, 0x9DA4243DE836994F, 0x066F70B33FE09017, 0x4DC4DE189B671A1C,
+    0x51039AB7712457C3, 0xC07A3F80C31FB4B4, 0xB46EE9C5E64A6E7C, 0xB3819A42ABE61C87,
+    0x21A007933A522A20, 0x2DF16F761598AA4F, 0x763C4A1371B368FD, 0xF793C46702E086A0,
+    0xD7288E012AEB8D31, 0xDE336A2A4BC1C44B, 0x0BF692B38D079F23, 0x2C604A7A177326B3,
+    0x4850E73E03EB6064, 0xCFC447F1E53C8E1B, 0xB05CA3F564268D99, 0x9AE182C8BC9474E8,
+    0xA4FC4BD4FC5558CA, 0xE755178D58FC4E76, 0x69B97DB1A4C03DFE, 0xF9B5B7C4ACC67C96,
+    0xFC6A82D64B8655FB, 0x9C684CB6C4D24417, 0x8EC97D2917456ED0, 0x6703DF9D2924E97E,
+    0xC547F57E42A7444E, 0x78E37644E7CAD29E, 0xFE9A44E9362F05FA, 0x08BD35CC38336615,
+    0x9315E5EB3A129ACE, 0x94061B871E04DF75, 0xDF1D9F9D784BA010, 0x3BBA57B68871B59D,
+    0xD2B7ADEEDED1F73F, 0xF7A255D83BC373F8, 0xD7F4F2448C0CEB81, 0xD95BE88CD210FFA7,
+    0x336F52F8FF4728E7, 0xA74049DAC312AC71, 0xA2F61BB6E437FDB5, 0x4F2A5CB07F6A35B3,
+    0x87D380BDA5BF7859, 0x16B9F7E06C453A21, 0x7BA2484C8A0FD54E, 0xF3A678CAD9A2E38C,
+    0x39B0BF7DDE437BA2, 0xFCAF55C1BF8A4424, 0x18FCF680573FA594, 0x4C0563B89F495AC3,
+    0x40E087931A00930D, 0x8CFFA9412EB642C1, 0x68CA39053261169F, 0x7A1EE967D27579E2,
+    0x9D1D60E5076F5B6F, 0x3810E399B6F65BA2, 0x32095B6D4AB5F9B1, 0x35CAB62109DD038A,
+    0xA90B24499FCFAFB1, 0x77A225A07CC2C6BD, 0x513E5E634C70E331, 0x4361C0CA3F692F12,
+    0xD941ACA44B20A45B, 0x528F7C8602C5807B, 0x52AB92BEB9613989, 0x9D1DFA2EFC557F73,
+    0x722FF175F572C348, 0x1D1260A51107FE97, 0x7A249A57EC0C9BA2, 0x04208FE9E8F7F2D6,
+    0x5A110C6058B920A0, 0x0CD9A497658A5698, 0x56FD23C8F9715A4C, 0x284C847B9D887AAE,
+    0x04FEABFBBDB619CB, 0x742E1E651C60BA83, 0x9A9632E65904AD3C, 0x881B82A13B51B9E2,
+    0x506E6744CD974924, 0xB0183DB56FFC6A79, 0x0ED9B915C66ED37E, 0x5E11E86D5873D484,
+    0xF678647E3519AC6E, 0x1B85D488D0F20CC5, 0xDAB9FE6525D89021, 0x0D151D86ADB73615,
+    0xA865A54EDCC0F019, 0x93C42566AEF98FFB, 0x99E7AFEABE000731, 0x48CBFF086DDF285A,
+    0x7F9B6AF1EBF78BAF, 0x58627E1A149BBA21, 0x2CD16E2ABD791E33, 0xD363EFF5F0977996,
+    0x0CE2A38C344A6EED, 0x1A804AADB9CFA741, 0x907F30421D78C5DE, 0x501F65EDB3034D07,
+    0x37624AE5A48FA6E9, 0x957BAF61700CFF4E, 0x3A6C27934E31188A, 0xD49503536ABCA345,
+    0x088E049589C432E0, 0xF943AEE7FEBF21B8, 0x6C3B8E3E336139D3, 0x364F6FFA464EE52E,
+    0xD60F6DCEDC314222, 0x56963B0DCA418FC0, 0x16F50EDF91E513AF, 0xEF1955914B609F93,
+    0x565601C0364E3228, 0xECB53939887E8175, 0xBAC7A9A18531294B, 0xB344C470397BBA52,
+    0x65D34954DAF3CEBD, 0xB4B81B3FA97511E2, 0xB422061193D6F6A7, 0x071582401C38434D,
+    0x7A13F18BBEDC4FF5, 0xBC4097B116C524D2, 0x59B97885E2F2EA28, 0x99170A5DC3115544,
+    0x6F423357E7C6A9F9, 0x325928EE6E6F8794, 0xD0E4366228B03343, 0x565C31F7DE89EA27,
+    0x30F5611484119414, 0xD873DB391292ED4F, 0x7BD94E1D8E17DEBC, 0xC7D9F16864A76E94,
+    0x947AE053EE56E63C, 0xC8C93882F9475F5F, 0x3A9BF55BA91F81CA, 0xD9A11FBB3D9808E4,
+    0x0FD22063EDC29FCA, 0xB3F256D8ACA0B0B9, 0xB03031A8B4516E84, 0x35DD37D5871448AF,
+    0xE9F6082B05542E4E, 0xEBFAFA33D7254B59, 0x9255ABB50D532280, 0xB9AB4CE57F2D34F3,
+    0x693501D628297551, 0xC62C58F97DD949BF, 0xCD454F8F19C5126A, 0xBBE83F4ECC2BDECB,
+    0xDC842B7E2819E230, 0xBA89142E007503B8, 0xA3BC941D0A5061CB, 0xE9F6760E32CD8021,
+    0x09C7E552BC76492F, 0x852F54934DA55CC9, 0x8107FCCF064FCF56, 0x098954D51FFF6580,
+    0x23B70EDB1955C4BF, 0xC330DE426430F69D, 0x4715ED43E8A45C0A, 0xA8D7E4DAB780A08D,
+    0x0572B974F03CE0BB, 0xB57D2E985E1419C7, 0xE8D9ECBE2CF3D73F, 0x2FE4B17170E59750,
+    0x11317BA87905E790, 0x7FBF21EC8A1F45EC, 0x1725CABFCB045B00, 0x964E915CD5E2B207,
+    0x3E2B8BCBF016D66D, 0xBE7444E39328A0AC, 0xF85B2B4FBCDE44B7, 0x49353FEA39BA63B1,
+    0x1DD01AAFCD53486A, 0x1FCA8A92FD719F85, 0xFC7C95D827357AFA, 0x18A6A990C8B35EBD,
+    0xCCCB7005C6B9C28D, 0x3BDBB92C43B17F26, 0xAA70B5B4F89695A2, 0xE94C39A54A98307F,
+    0xB7A0B174CFF6F36E, 0xD4DBA84729AF48AD, 0x2E18BC1AD9704A68, 0x2DE0966DAF2F8B1C,
+    0xB9C11D5B1E43A07E, 0x64972D68DEE33360, 0x94628D38D0C20584, 0xDBC0D2B6AB90A559,
+    0xD2733C4335C6A72F, 0x7E75D99D94A70F4D, 0x6CED1983376FA72B, 0x97FCAACBF030BC24,
+    0x7B77497B32503B12, 0x8547EDDFB81CCB94, 0x79999CDFF70902CB, 0xCFFE1939438E9B24,
+    0x829626E3892D95D7, 0x92FAE24291F2B3F1, 0x63E22C147B9C3403, 0xC678B6D860284A1C,
+    0x5873888850659AE7, 0x0981DCD296A8736D, 0x9F65789A6509A440, 0x9FF38FED72E9052F,
+    0xE479EE5B9930578C, 0xE7F28ECD2D49EECD, 0x56C074A581EA17FE, 0x5544F7D774B14AEF,
+    0x7B3F0195FC6F290F, 0x12153635B2C0CF57, 0x7F5126DBBA5E0CA7, 0x7A76956C3EAFB413,
+    0x3D5774A11D31AB39, 0x8A1B083821F40CB4, 0x7B4A38E32537DF62, 0x950113646D1D6E03,
+    0x4DA8979A0041E8A9, 0x3BC36E078F7515D7, 0x5D0A12F27AD310D1, 0x7F9D1A2E1EBE1327,
+    0xDA3A361B1C5157B1, 0xDCDD7D20903D0C25, 0x36833336D068F707, 0xCE68341F79893389,
+    0xAB9090168DD05F34, 0x43954B3252DC25E5, 0xB438C2B67F98E5E9, 0x10DCD78E3851A492,
+    0xDBC27AB5447822BF, 0x9B3CDB65F82CA382, 0xB67B7896167B4C84, 0xBFCED1B0048EAC50,
+    0xA9119B60369FFEBD, 0x1FFF7AC80904BF45, 0xAC12FB171817EEE7, 0xAF08DA9177DDA93D,
+    0x1B0CAB936E65C744, 0xB559EB1D04E5E932, 0xC37B45B3F8D6F2BA, 0xC3A9DC228CAAC9E9,
+    0xF3B8B6675A6507FF, 0x9FC477DE4ED681DA, 0x67378D8ECCEF96CB, 0x6DD856D94D259236,
+    0xA319CE15B0B4DB31, 0x073973751F12DD5E, 0x8A8E849EB32781A5, 0xE1925C71285279F5,
+    0x74C04BF1790C0EFE, 0x4DDA48153C94938A, 0x9D266D6A1CC0542C, 0x7440FB816508C4FE,
+    0x13328503DF48229F, 0xD6BF7BAEE43CAC40, 0x4838D65F6EF6748F, 0x1E152328F3318DEA,
+    0x8F8419A348F296BF, 0x72C8834A5957B511, 0xD7A023A73260B45C, 0x94EBC8ABCFB56DAE,
+    0x9FC10D0F989993E0, 0xDE68A2355B93CAE6, 0xA44CFE79AE538BBE, 0x9D1D84FCCE371425,
+    0x51D2B1AB2DDFB636, 0x2FD7E4B9E72CD38C, 0x65CA5B96B7552210, 0xDD69A0D8AB3B546D,
+    0x604D51B25FBF70E2, 0x73AA8A564FB7AC9E, 0x1A8C1E992B941148, 0xAAC40A2703D9BEA0,
+    0x764DBEAE7FA4F3A6, 0x1E99B96E70A9BE8B, 0x2C5E9DEB57EF4743, 0x3A938FEE32D29981,
+    0x26E6DB8FFDF5ADFE, 0x469356C504EC9F9D, 0xC8763C5B08D1908C, 0x3F6C6AF859D80055,
+    0x7F7CC39420A3A545, 0x9BFB227EBDF4C5CE, 0x89039D79D6FC5C5C, 0x8FE88B57305E2AB6,
+    0xA09E8C8C35AB96DE, 0xFA7E393983325753, 0xD6B6D0ECC617C699, 0xDFEA21EA9E7557E3,
+    0xB67C1FA481680AF8, 0xCA1E3785A9E724E5, 0x1CFC8BED0D681639, 0xD18D8549D140CAEA,
+    0x4ED0FE7E9DC91335, 0xE4DBF0634473F5D2, 0x1761F93A44D5AEFE, 0x53898E4C3910DA55,
+    0x734DE8181F6EC39A, 0x2680B122BAA28D97, 0x298AF231C85BAFAB, 0x7983EED3740847D5,
+    0x66C1A2A1A60CD889, 0x9E17E49642A3E4C1, 0xEDB454E7BADC0805, 0x50B704CAB602C329,
+    0x4CC317FB9CDDD023, 0x66B4835D9EAFEA22, 0x219B97E26FFC81BD, 0x261E4E4C0A333A9D,
+    0x1FE2CCA76517DB90, 0xD7504DFA8816EDBB, 0xB9571FA04DC089C8, 0x1DDC0325259B27DE,
+    0xCF3F4688801EB9AA, 0xF4F5D05C10CAB243, 0x38B6525C21A42B0E, 0x36F60E2BA4FA6800,
+    0xEB3593803173E0CE, 0x9C4CD6257C5A3603, 0xAF0C317D32ADAA8A, 0x258E5A80C7204C4B,
+    0x8B889D624D44885D, 0xF4D14597E660F855, 0xD4347F66EC8941C3, 0xE699ED85B0DFB40D,
+    0x2472F6207C2D0484, 0xC2A1E7B5B459AEB5, 0xAB4F6451CC1D45EC, 0x63767572AE3D6174,
+    0xA59E0BD101731A28, 0x116D0016CB948F09, 0x2CF9C8CA052F6E9F, 0x0B090A7560A968E3,
+    0xABEEDDB2DDE06FF1, 0x58EFC10B06A2068D, 0xC6E57A78FBD986E0, 0x2EAB8CA63CE802D7,
+    0x14A195640116F336, 0x7C0828DD624EC390, 0xD74BBE77E6116AC7, 0x804456AF10F5FB53,
+    0xEBE9EA2ADF4321C7, 0x03219A39EE587A30, 0x49787FEF17AF9924, 0xA1E9300CD8520548,
+    0x5B45E522E4B1B4EF, 0xB49C3B3995091A36, 0xD4490AD526F14431, 0x12A8F216AF9418C2,
+    0x001F837CC7350524, 0x1877B51E57A764D5, 0xA2853B80F17F58EE, 0x993E1DE72D36D310,
+    0xB3598080CE64A656, 0x252F59CF0D9F04BB, 0xD23C8E176D113600, 0x1BDA0492E7E4586E,
+    0x21E0BD5026C619BF, 0x3B097ADAF088F94E, 0x8D14DEDB30BE846E, 0xF95CFFA23AF5F6F4,
+    0x3871700761B3F743, 0xCA672B91E9E4FA16, 0x64C8E531BFF53B55, 0x241260ED4AD1E87D,
+    0x106C09B972D2E822, 0x7FBA195410E5CA30, 0x7884D9BC6CB569D8, 0x0647DFEDCD894A29,
+    0x63573FF03E224774, 0x4FC8E9560F91B123, 0x1DB956E450275779, 0xB8D91274B9E9D4FB,
+    0xA2EBEE47E2FBFCE1, 0xD9F1F30CCD97FB09, 0xEFED53D75FD64E6B, 0x2E6D02C36017F67F,
+    0xA9AA4D20DB084E9B, 0xB64BE8D8B25396C1, 0x70CB6AF7C2D5BCF0, 0x98F076A4F7A2322E,
+    0xBF84470805E69B5F, 0x94C3251F06F90CF3, 0x3E003E616A6591E9, 0xB925A6CD0421AFF3,
+    0x61BDD1307C66E300, 0xBF8D5108E27E0D48, 0x240AB57A8B888B20, 0xFC87614BAF287E07,
+    0xEF02CDD06FFDB432, 0xA1082C0466DF6C0A, 0x8215E577001332C8, 0xD39BB9C3A48DB6CF,
+    0x2738259634305C14, 0x61CF4F94C97DF93D, 0x1B6BACA2AE4E125B, 0x758F450C88572E0B,
+    0x959F587D507A8359, 0xB063E962E045F54D, 0x60E8ED72C0DFF5D1, 0x7B64978555326F9F,
+    0xFD080D236DA814BA, 0x8C90FD9B083F4558, 0x106F72FE81E2C590, 0x7976033A39F7D952,
+    0xA4EC0132764CA04B, 0x733EA705FAE4FA77, 0xB4D8F77BC3E56167, 0x9E21F4F903B33FD9,
+    0x9D765E419FB69F6D, 0xD30C088BA61EA5EF, 0x5D94337FBFAF7F5B, 0x1A4E4822EB4D7A59,
+    0x6FFE73E81B637FB3, 0xDDF957BC36D8B9CA, 0x64D0E29EEA8838B3, 0x08DD9BDFD96B9F63,
+    0x087E79E5A57D1D13, 0xE328E230E3E2B3FB, 0x1C2559E30F0946BE, 0x720BF5F26F4D2EAA,
+    0xB0774D261CC609DB, 0x443F64EC5A371195, 0x4112CF68649A260E, 0xD813F2FAB7F5C5CA,
+    0x660D3257380841EE, 0x59AC2C7873F910A3, 0xE846963877671A17, 0x93B633ABFA3469F8,
+    0xC0C0F5A60EF4CDCF, 0xCAF21ECD4377B28C, 0x57277707199B8175, 0x506C11B9D90E8B1D,
+    0xD83CC2687A19255F, 0x4A29C6465A314CD1, 0xED2DF21216235097, 0xB5635C95FF7296E2,
+    0x22AF003AB672E811, 0x52E762596BF68235, 0x9AEBA33AC6ECC6B0, 0x944F6DE09134DFB6,
+    0x6C47BEC883A7DE39, 0x6AD047C430A12104, 0xA5B1CFDBA0AB4067, 0x7C45D833AFF07862,
+    0x5092EF950A16DA0B, 0x9338E69C052B8E7B, 0x455A4B4CFE30E3F5, 0x6B02E63195AD0CF8,
+    0x6B17B224BAD6BF27, 0xD1E0CCD25BB9C169, 0xDE0C89A556B9AE70, 0x50065E535A213CF6,
+    0x9C1169FA2777B874, 0x78EDEFD694AF1EED, 0x6DC93D9526A50E68, 0xEE97F453F06791ED,
+    0x32AB0EDB696703D3, 0x3A6853C7E70757A7, 0x31865CED6120F37D, 0x67FEF95D92607890,
+    0x1F2B1D1F15F6DC9C, 0xB69E38A8965C6B65, 0xAA9119FF184CCCF4, 0xF43C732873F24C13,
+    0xFB4A3D794A9A80D2, 0x3550C2321FD6109C, 0x371F77E76BB8417E, 0x6BFA9AAE5EC05779,
+    0xCD04F3FF001A4778, 0xE3273522064480CA, 0x9F91508BFFCFC14A, 0x049A7F41061A9E60,
+    0xFCB6BE43A9F2FE9B, 0x08DE8A1C7797DA9B, 0x8F9887E6078735A1, 0xB5B4071DBFC73A66,
+    0x230E343DFBA08D33, 0x43ED7F5A0FAE657D, 0x3A88A0FBBCB05C63, 0x21874B8B4D2DBC4F,
+    0x1BDEA12E35F6A8C9, 0x53C065C6C8E63528, 0xE34A1D250E7A8D6B, 0xD6B04D3B7651DD7E,
+    0x5E90277E7CB39E2D, 0x2C046F22062DC67D, 0xB10BB459132D0A26, 0x3FA9DDFB67E2F199,
+    0x0E09B88E1914F7AF, 0x10E8B35AF3EEAB37, 0x9EEDECA8E272B933, 0xD4C718BC4AE8AE5F,
+    0x81536D601170FC20, 0x91B534F885818A06, 0xEC8177F83F900978, 0x190E714FADA5156E,
+    0xB592BF39B0364963, 0x89C350C893AE7DC1, 0xAC042E70F8B383F2, 0xB49B52E587A1EE60,
+    0xFB152FE3FF26DA89, 0x3E666E6F69AE2C15, 0x3B544EBE544C19F9, 0xE805A1E290CF2456,
+    0x24B33C9D7ED25117, 0xE74733427B72F0C1, 0x0A804D18B7097475, 0x57E3306D881EDB4F,
+    0x4AE7D6A36EB5DBCB, 0x2D8D5432157064C8, 0xD1E649DE1E7F268B, 0x8A328A1CEDFE552C,
+    0x07A3AEC79624C7DA, 0x84547DDC3E203C94, 0x990A98FD5071D263, 0x1A4FF12616EEFC89,
+    0xF6F7FD1431714200, 0x30C05B1BA332F41C, 0x8D2636B81555A786, 0x46C9FEB55D120902,
+    0xCCEC0A73B49C9921, 0x4E9D2827355FC492, 0x19EBB029435DCB0F, 0x4659D2B743848A2C,
+    0x963EF2C96B33BE31, 0x74F85198B05A2E7D, 0x5A0F544DD2B1FB18, 0x03727073C2E134B1,
+    0xC7F6AA2DE59AEA61, 0x352787BAA0D7C22F, 0x9853EAB63B5E0B35, 0xABBDCDD7ED5C0860,
+    0xCF05DAF5AC8D77B0, 0x49CAD48CEBF4A71E, 0x7A4C10EC2158C4A6, 0xD9E92AA246BF719E,
+    0x13AE978D09FE5557, 0x730499AF921549FF, 0x4E4B705B92903BA4, 0xFF577222C14F0A3A,
+    0x55B6344CF97AAFAE, 0xB862225B055B6960, 0xCAC09AFBDDD2CDB4, 0xDAF8E9829FE96B5F,
+    0xB5FDFC5D3132C498, 0x310CB380DB6F7503, 0xE87FBB46217A360E, 0x2102AE466EBB1148,
+    0xF8549E1A3AA5E00D, 0x07A69AFDCC42261A, 0xC4C118BFE78FEAAE, 0xF9F4892ED96BD438,
+    0x1AF3DBE25D8F45DA, 0xF5B4B0B0D2DEEEB4, 0x962ACEEFA82E1C84, 0x046E3ECAAF453CE9,
+    0xF05D129681949A4C, 0x964781CE734B3C84, 0x9C2ED44081CE5FBD, 0x522E23F3925E319E,
+    0x177E00F9FC32F791, 0x2BC60A63A6F3B3F2, 0x222BBFAE61725606, 0x486289DDCC3D6780,
+    0x7DC7785B8EFDFC80, 0x8AF38731C02BA980, 0x1FAB64EA29A2DDF7, 0xE4D9429322CD065A,
+    0x9DA058C67844F20C, 0x24C0E332B70019B0, 0x233003B5A6CFE6AD, 0xD586BD01C5C217F6,
+    0x5E5637885F29BC2B, 0x7EBA726D8C94094B, 0x0A56A5F0BFE39272, 0xD79476A84EE20D06,
+    0x9E4C1269BAA4BF37, 0x17EFEE45B0DEE640, 0x1D95B0A5FCF90BC6, 0x93CBE0B699C2585D,
+    0x65FA4F227A2B6D79, 0xD5F9E858292504D5, 0xC2B5A03F71471A6F, 0x59300222B4561E00,
+    0xCE2F8642CA0712DC, 0x7CA9723FBB2E8988, 0x2785338347F2BA08, 0xC61BB3A141E50E8C,
+    0x150F361DAB9DEC26, 0x9F6A419D382595F4, 0x64A53DC924FE7AC9, 0x142DE49FFF7A7C3D,
+    0x0C335248857FA9E7, 0x0A9C32D5EAE45305, 0xE6C42178C4BBB92E, 0x71F1CE2490D20B07,
+    0xF1BCC3D275AFE51A, 0xE728E8C83C334074, 0x96FBF83A12884624, 0x81A1549FD6573DA5,
+    0x5FA7867CAF35E149, 0x56986E2EF3ED091B, 0x917F1DD5F8886C61, 0xD20D8C88C8FFE65F,
+    0x31D71DCE64B2C310, 0xF165B587DF898190, 0xA57E6339DD2CF3A0, 0x1EF6E6DBB1961EC9,
+    0x70CC73D90BC26E24, 0xE21A6B35DF0C3AD7, 0x003A93D8B2806962, 0x1C99DED33CB890A1,
+    0xCF3145DE0ADD4289, 0xD0E4427A5514FB72, 0x77C621CC9FB3A483, 0x67A34DAC4356550B,
+    0xF8D626AAAF278509
+]
+
+
+class ZobristHasher:
+    def __init__(self, array: List[int]) -> None:
+        assert len(array) >= 781
+        self.array = array
+
+    def hash_board(self, board: chess.BaseBoard) -> int:
+        zobrist_hash = 0
+
+        for pivot, squares in enumerate(board.occupied_co):
+            for square in chess.scan_reversed(squares):
+                piece_index = (typing.cast(chess.PieceType, board.piece_type_at(square)) - 1) * 2 + pivot
+                zobrist_hash ^= self.array[64 * piece_index + square]
+
+        return zobrist_hash
+
+    def hash_castling(self, board: chess.Board) -> int:
+        zobrist_hash = 0
+
+        # Hash in the castling flags.
+        if board.has_kingside_castling_rights(chess.WHITE):
+            zobrist_hash ^= self.array[768]
+        if board.has_queenside_castling_rights(chess.WHITE):
+            zobrist_hash ^= self.array[768 + 1]
+        if board.has_kingside_castling_rights(chess.BLACK):
+            zobrist_hash ^= self.array[768 + 2]
+        if board.has_queenside_castling_rights(chess.BLACK):
+            zobrist_hash ^= self.array[768 + 3]
+
+        return zobrist_hash
+
+    def hash_ep_square(self, board: chess.Board) -> int:
+        # Hash in the en passant file.
+        if board.ep_square:
+            # But only if there's actually a pawn ready to capture it. Legality
+            # of the potential capture is irrelevant.
+            if board.turn == chess.WHITE:
+                ep_mask = chess.shift_down(chess.BB_SQUARES[board.ep_square])
+            else:
+                ep_mask = chess.shift_up(chess.BB_SQUARES[board.ep_square])
+            ep_mask = chess.shift_left(ep_mask) | chess.shift_right(ep_mask)
+
+            if ep_mask & board.pawns & board.occupied_co[board.turn]:
+                return self.array[772 + chess.square_file(board.ep_square)]
+        return 0
+
+    def hash_turn(self, board: chess.Board) -> int:
+        # Hash in the turn.
+        return self.array[780] if board.turn == chess.WHITE else 0
+
+    def __call__(self, board: chess.Board) -> int:
+        return (self.hash_board(board) ^ self.hash_castling(board) ^
+                self.hash_ep_square(board) ^ self.hash_turn(board))
+
+
+def zobrist_hash(board: chess.Board, *, _hasher: Callable[[chess.Board], int] = ZobristHasher(POLYGLOT_RANDOM_ARRAY)) -> int:
+    """
+    Calculates the Polyglot Zobrist hash of the position.
+
+    A Zobrist hash is an XOR of pseudo-random values picked from
+    an array. Which values are picked is decided by features of the
+    position, such as piece positions, castling rights and en passant
+    squares.
+    """
+    return _hasher(board)
+
+
+class Entry(NamedTuple):
+    """An entry from a Polyglot opening book."""
+
+    key: int
+    """The Zobrist hash of the position."""
+
+    raw_move: int
+    """
+    The raw binary representation of the move. Use
+    :data:`~chess.polyglot.Entry.move` instead.
+    """
+
+    weight: int
+    """An integer value that can be used as the weight for this entry."""
+
+    learn: int
+    """Another integer value that can be used for extra information."""
+
+    move: chess.Move
+    """The :class:`~chess.Move`."""
+
+
+class _EmptyMmap(bytearray):
+    def size(self) -> int:
+        return 0
+
+    def close(self) -> None:
+        pass
+
+
+def _randint(rng: Optional[random.Random], a: int, b: int) -> int:
+    return random.randint(a, b) if rng is None else rng.randint(a, b)
+
+
+class MemoryMappedReader:
+    """Maps a Polyglot opening book to memory."""
+
+    def __init__(self, filename: PathLike) -> None:
+        fd = os.open(filename, os.O_RDONLY | os.O_BINARY if hasattr(os, "O_BINARY") else os.O_RDONLY)
+        try:
+            self.mmap: Union[mmap.mmap, _EmptyMmap] = mmap.mmap(fd, 0, access=mmap.ACCESS_READ)
+        except (ValueError, OSError):
+            self.mmap = _EmptyMmap()  # Workaround for empty opening books.
+        finally:
+            os.close(fd)
+
+        if self.mmap.size() % ENTRY_STRUCT.size != 0:
+            raise IOError(f"invalid file size: ensure {filename!r} is a valid polyglot opening book")
+
+        try:
+            # Python 3.8
+            self.mmap.madvise(mmap.MADV_RANDOM)  # type: ignore
+        except AttributeError:
+            pass
+
+    def __enter__(self) -> MemoryMappedReader:
+        return self
+
+    def __exit__(self, exc_type: Optional[Type[BaseException]], exc_value: Optional[BaseException], traceback: Optional[TracebackType]) -> None:
+        return self.close()
+
+    def __len__(self) -> int:
+        return self.mmap.size() // ENTRY_STRUCT.size
+
+    def __getitem__(self, index: int) -> Entry:
+        if index < 0:
+            index = len(self) + index
+
+        try:
+            key, raw_move, weight, learn = ENTRY_STRUCT.unpack_from(self.mmap, index * ENTRY_STRUCT.size)
+        except struct.error:
+            raise IndexError()
+
+        # Extract source and target square.
+        to_square = raw_move & 0x3f
+        from_square = (raw_move >> 6) & 0x3f
+
+        # Extract the promotion type.
+        promotion_part = (raw_move >> 12) & 0x7
+        promotion = promotion_part + 1 if promotion_part else None
+
+        # Piece drop.
+        if from_square == to_square:
+            promotion, drop = None, promotion
+        else:
+            drop = None
+
+        # Entry with move (not normalized).
+        move = chess.Move(from_square, to_square, promotion, drop)
+        return Entry(key, raw_move, weight, learn, move)
+
+    def __iter__(self) -> Iterator[Entry]:
+        for i in range(len(self)):
+            yield self[i]
+
+    def bisect_key_left(self, key: int) -> int:
+        lo = 0
+        hi = len(self)
+
+        while lo < hi:
+            mid = (lo + hi) // 2
+            mid_key, _, _, _ = ENTRY_STRUCT.unpack_from(self.mmap, mid * ENTRY_STRUCT.size)
+            if mid_key < key:
+                lo = mid + 1
+            else:
+                hi = mid
+
+        return lo
+
+    def __contains__(self, entry: Entry) -> bool:
+        return any(current == entry for current in self.find_all(entry.key, minimum_weight=entry.weight))
+
+    def find_all(self, board: Union[chess.Board, int], *, minimum_weight: int = 1, exclude_moves: Container[chess.Move] = []) -> Iterator[Entry]:
+        """Seeks a specific position and yields corresponding entries."""
+        try:
+            key = int(board)  # type: ignore
+            context: Optional[chess.Board] = None
+        except (TypeError, ValueError):
+            context = typing.cast(chess.Board, board)
+            key = zobrist_hash(context)
+
+        i = self.bisect_key_left(key)
+        size = len(self)
+
+        while i < size:
+            entry = self[i]
+            i += 1
+
+            if entry.key != key:
+                break
+
+            if entry.weight < minimum_weight:
+                continue
+
+            if context:
+                move = context._from_chess960(context.chess960, entry.move.from_square, entry.move.to_square, entry.move.promotion, entry.move.drop)
+                entry = Entry(entry.key, entry.raw_move, entry.weight, entry.learn, move)
+
+            if exclude_moves and entry.move in exclude_moves:
+                continue
+
+            if context and not context.is_legal(entry.move):
+                continue
+
+            yield entry
+
+    def find(self, board: Union[chess.Board, int], *, minimum_weight: int = 1, exclude_moves: Container[chess.Move] = []) -> Entry:
+        """
+        Finds the main entry for the given position or Zobrist hash.
+
+        The main entry is the (first) entry with the highest weight.
+
+        By default, entries with weight ``0`` are excluded. This is a common
+        way to delete entries from an opening book without compacting it. Pass
+        *minimum_weight* ``0`` to select all entries.
+
+        :raises: :exc:`IndexError` if no entries are found. Use
+            :func:`~chess.polyglot.MemoryMappedReader.get()` if you prefer to
+            get ``None`` instead of an exception.
+        """
+        try:
+            return max(self.find_all(board, minimum_weight=minimum_weight, exclude_moves=exclude_moves), key=lambda entry: entry.weight)
+        except ValueError:
+            raise IndexError()
+
+    def get(self, board: Union[chess.Board, int], default: Optional[Entry] = None, *, minimum_weight: int = 1, exclude_moves: Container[chess.Move] = []) -> Optional[Entry]:
+        try:
+            return self.find(board, minimum_weight=minimum_weight, exclude_moves=exclude_moves)
+        except IndexError:
+            return default
+
+    def choice(self, board: Union[chess.Board, int], *, minimum_weight: int = 1, exclude_moves: Container[chess.Move] = [], random: Optional[random.Random] = None) -> Entry:
+        """
+        Uniformly selects a random entry for the given position.
+
+        :raises: :exc:`IndexError` if no entries are found.
+        """
+        chosen_entry = None
+
+        for i, entry in enumerate(self.find_all(board, minimum_weight=minimum_weight, exclude_moves=exclude_moves)):
+            if chosen_entry is None or _randint(random, 0, i) == i:
+                chosen_entry = entry
+
+        if chosen_entry is None:
+            raise IndexError()
+
+        return chosen_entry
+
+    def weighted_choice(self, board: Union[chess.Board, int], *, exclude_moves: Container[chess.Move] = [], random: Optional[random.Random] = None) -> Entry:
+        """
+        Selects a random entry for the given position, distributed by the
+        weights of the entries.
+
+        :raises: :exc:`IndexError` if no entries are found.
+        """
+        total_weights = sum(entry.weight for entry in self.find_all(board, exclude_moves=exclude_moves))
+        if not total_weights:
+            raise IndexError()
+
+        choice = _randint(random, 0, total_weights - 1)
+
+        current_sum = 0
+        for entry in self.find_all(board, exclude_moves=exclude_moves):
+            current_sum += entry.weight
+            if current_sum > choice:
+                return entry
+
+        assert False
+
+    def close(self) -> None:
+        """Closes the reader."""
+        self.mmap.close()
+
+
+def open_reader(path: PathLike) -> MemoryMappedReader:
+    """
+    Creates a reader for the file at the given path.
+
+    The following example opens a book to find all entries for the start
+    position:
+
+    >>> import chess
+    >>> import chess.polyglot
+    >>>
+    >>> board = chess.Board()
+    >>>
+    >>> with chess.polyglot.open_reader("data/polyglot/performance.bin") as reader:
+    ...    for entry in reader.find_all(board):
+    ...        print(entry.move, entry.weight, entry.learn)
+    e2e4 1 0
+    d2d4 1 0
+    c2c4 1 0
+    """
+    return MemoryMappedReader(path)

venv/lib/python3.11/site-packages/chess/svg.py

@@ -0,0 +1,537 @@
+# This file is part of the python-chess library.
+# Copyright (C) 2016-2021 Niklas Fiekas <niklas.fiekas@backscattering.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Piece vector graphics are copyright (C) Colin M.L. Burnett
+# <https://en.wikipedia.org/wiki/User:Cburnett> and also licensed under the
+# GNU General Public License.
+
+from __future__ import annotations
+
+import math
+import xml.etree.ElementTree as ET
+
+import chess
+
+from typing import Dict, Iterable, Optional, Tuple, Union
+from chess import Color, IntoSquareSet, Square
+
+
+SQUARE_SIZE = 45
+MARGIN = 20
+
+PIECES = {
+    "b": """<g id="black-bishop" class="black bishop" fill="none" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M9 36c3.39-.97 10.11.43 13.5-2 3.39 2.43 10.11 1.03 13.5 2 0 0 1.65.54 3 2-.68.97-1.65.99-3 .5-3.39-.97-10.11.46-13.5-1-3.39 1.46-10.11.03-13.5 1-1.354.49-2.323.47-3-.5 1.354-1.94 3-2 3-2zm6-4c2.5 2.5 12.5 2.5 15 0 .5-1.5 0-2 0-2 0-2.5-2.5-4-2.5-4 5.5-1.5 6-11.5-5-15.5-11 4-10.5 14-5 15.5 0 0-2.5 1.5-2.5 4 0 0-.5.5 0 2zM25 8a2.5 2.5 0 1 1-5 0 2.5 2.5 0 1 1 5 0z" fill="#000" stroke-linecap="butt"/><path d="M17.5 26h10M15 30h15m-7.5-14.5v5M20 18h5" stroke="#fff" stroke-linejoin="miter"/></g>""",  # noqa: E501
+    "k": """<g id="black-king" class="black king" fill="none" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M22.5 11.63V6" stroke-linejoin="miter"/><path d="M22.5 25s4.5-7.5 3-10.5c0 0-1-2.5-3-2.5s-3 2.5-3 2.5c-1.5 3 3 10.5 3 10.5" fill="#000" stroke-linecap="butt" stroke-linejoin="miter"/><path d="M11.5 37c5.5 3.5 15.5 3.5 21 0v-7s9-4.5 6-10.5c-4-6.5-13.5-3.5-16 4V27v-3.5c-3.5-7.5-13-10.5-16-4-3 6 5 10 5 10V37z" fill="#000"/><path d="M20 8h5" stroke-linejoin="miter"/><path d="M32 29.5s8.5-4 6.03-9.65C34.15 14 25 18 22.5 24.5l.01 2.1-.01-2.1C20 18 9.906 14 6.997 19.85c-2.497 5.65 4.853 9 4.853 9M11.5 30c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0" stroke="#fff"/></g>""",  # noqa: E501
+    "n": """<g id="black-knight" class="black knight" fill="none" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M 22,10 C 32.5,11 38.5,18 38,39 L 15,39 C 15,30 25,32.5 23,18" style="fill:#000000; stroke:#000000;"/><path d="M 24,18 C 24.38,20.91 18.45,25.37 16,27 C 13,29 13.18,31.34 11,31 C 9.958,30.06 12.41,27.96 11,28 C 10,28 11.19,29.23 10,30 C 9,30 5.997,31 6,26 C 6,24 12,14 12,14 C 12,14 13.89,12.1 14,10.5 C 13.27,9.506 13.5,8.5 13.5,7.5 C 14.5,6.5 16.5,10 16.5,10 L 18.5,10 C 18.5,10 19.28,8.008 21,7 C 22,7 22,10 22,10" style="fill:#000000; stroke:#000000;"/><path d="M 9.5 25.5 A 0.5 0.5 0 1 1 8.5,25.5 A 0.5 0.5 0 1 1 9.5 25.5 z" style="fill:#ececec; stroke:#ececec;"/><path d="M 15 15.5 A 0.5 1.5 0 1 1 14,15.5 A 0.5 1.5 0 1 1 15 15.5 z" transform="matrix(0.866,0.5,-0.5,0.866,9.693,-5.173)" style="fill:#ececec; stroke:#ececec;"/><path d="M 24.55,10.4 L 24.1,11.85 L 24.6,12 C 27.75,13 30.25,14.49 32.5,18.75 C 34.75,23.01 35.75,29.06 35.25,39 L 35.2,39.5 L 37.45,39.5 L 37.5,39 C 38,28.94 36.62,22.15 34.25,17.66 C 31.88,13.17 28.46,11.02 25.06,10.5 L 24.55,10.4 z " style="fill:#ececec; stroke:none;"/></g>""",  # noqa: E501
+    "p": """<g id="black-pawn" class="black pawn"><path d="M22.5 9c-2.21 0-4 1.79-4 4 0 .89.29 1.71.78 2.38C17.33 16.5 16 18.59 16 21c0 2.03.94 3.84 2.41 5.03-3 1.06-7.41 5.55-7.41 13.47h23c0-7.92-4.41-12.41-7.41-13.47 1.47-1.19 2.41-3 2.41-5.03 0-2.41-1.33-4.5-3.28-5.62.49-.67.78-1.49.78-2.38 0-2.21-1.79-4-4-4z" fill="#000" stroke="#000" stroke-width="1.5" stroke-linecap="round"/></g>""",  # noqa: E501
+    "q": """<g id="black-queen" class="black queen" fill="#000" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><g fill="#000" stroke="none"><circle cx="6" cy="12" r="2.75"/><circle cx="14" cy="9" r="2.75"/><circle cx="22.5" cy="8" r="2.75"/><circle cx="31" cy="9" r="2.75"/><circle cx="39" cy="12" r="2.75"/></g><path d="M9 26c8.5-1.5 21-1.5 27 0l2.5-12.5L31 25l-.3-14.1-5.2 13.6-3-14.5-3 14.5-5.2-13.6L14 25 6.5 13.5 9 26zM9 26c0 2 1.5 2 2.5 4 1 1.5 1 1 .5 3.5-1.5 1-1.5 2.5-1.5 2.5-1.5 1.5.5 2.5.5 2.5 6.5 1 16.5 1 23 0 0 0 1.5-1 0-2.5 0 0 .5-1.5-1-2.5-.5-2.5-.5-2 .5-3.5 1-2 2.5-2 2.5-4-8.5-1.5-18.5-1.5-27 0z" stroke-linecap="butt"/><path d="M11 38.5a35 35 1 0 0 23 0" fill="none" stroke-linecap="butt"/><path d="M11 29a35 35 1 0 1 23 0M12.5 31.5h20M11.5 34.5a35 35 1 0 0 22 0M10.5 37.5a35 35 1 0 0 24 0" fill="none" stroke="#fff"/></g>""",  # noqa: E501
+    "r": """<g id="black-rook" class="black rook" fill="#000" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M9 39h27v-3H9v3zM12.5 32l1.5-2.5h17l1.5 2.5h-20zM12 36v-4h21v4H12z" stroke-linecap="butt"/><path d="M14 29.5v-13h17v13H14z" stroke-linecap="butt" stroke-linejoin="miter"/><path d="M14 16.5L11 14h23l-3 2.5H14zM11 14V9h4v2h5V9h5v2h5V9h4v5H11z" stroke-linecap="butt"/><path d="M12 35.5h21M13 31.5h19M14 29.5h17M14 16.5h17M11 14h23" fill="none" stroke="#fff" stroke-width="1" stroke-linejoin="miter"/></g>""",  # noqa: E501
+    "B": """<g id="white-bishop" class="white bishop" fill="none" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><g fill="#fff" stroke-linecap="butt"><path d="M9 36c3.39-.97 10.11.43 13.5-2 3.39 2.43 10.11 1.03 13.5 2 0 0 1.65.54 3 2-.68.97-1.65.99-3 .5-3.39-.97-10.11.46-13.5-1-3.39 1.46-10.11.03-13.5 1-1.354.49-2.323.47-3-.5 1.354-1.94 3-2 3-2zM15 32c2.5 2.5 12.5 2.5 15 0 .5-1.5 0-2 0-2 0-2.5-2.5-4-2.5-4 5.5-1.5 6-11.5-5-15.5-11 4-10.5 14-5 15.5 0 0-2.5 1.5-2.5 4 0 0-.5.5 0 2zM25 8a2.5 2.5 0 1 1-5 0 2.5 2.5 0 1 1 5 0z"/></g><path d="M17.5 26h10M15 30h15m-7.5-14.5v5M20 18h5" stroke-linejoin="miter"/></g>""",  # noqa: E501
+    "K": """<g id="white-king" class="white king" fill="none" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M22.5 11.63V6M20 8h5" stroke-linejoin="miter"/><path d="M22.5 25s4.5-7.5 3-10.5c0 0-1-2.5-3-2.5s-3 2.5-3 2.5c-1.5 3 3 10.5 3 10.5" fill="#fff" stroke-linecap="butt" stroke-linejoin="miter"/><path d="M11.5 37c5.5 3.5 15.5 3.5 21 0v-7s9-4.5 6-10.5c-4-6.5-13.5-3.5-16 4V27v-3.5c-3.5-7.5-13-10.5-16-4-3 6 5 10 5 10V37z" fill="#fff"/><path d="M11.5 30c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0"/></g>""",  # noqa: E501
+    "N": """<g id="white-knight" class="white knight" fill="none" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M 22,10 C 32.5,11 38.5,18 38,39 L 15,39 C 15,30 25,32.5 23,18" style="fill:#ffffff; stroke:#000000;"/><path d="M 24,18 C 24.38,20.91 18.45,25.37 16,27 C 13,29 13.18,31.34 11,31 C 9.958,30.06 12.41,27.96 11,28 C 10,28 11.19,29.23 10,30 C 9,30 5.997,31 6,26 C 6,24 12,14 12,14 C 12,14 13.89,12.1 14,10.5 C 13.27,9.506 13.5,8.5 13.5,7.5 C 14.5,6.5 16.5,10 16.5,10 L 18.5,10 C 18.5,10 19.28,8.008 21,7 C 22,7 22,10 22,10" style="fill:#ffffff; stroke:#000000;"/><path d="M 9.5 25.5 A 0.5 0.5 0 1 1 8.5,25.5 A 0.5 0.5 0 1 1 9.5 25.5 z" style="fill:#000000; stroke:#000000;"/><path d="M 15 15.5 A 0.5 1.5 0 1 1 14,15.5 A 0.5 1.5 0 1 1 15 15.5 z" transform="matrix(0.866,0.5,-0.5,0.866,9.693,-5.173)" style="fill:#000000; stroke:#000000;"/></g>""",  # noqa: E501
+    "P": """<g id="white-pawn" class="white pawn"><path d="M22.5 9c-2.21 0-4 1.79-4 4 0 .89.29 1.71.78 2.38C17.33 16.5 16 18.59 16 21c0 2.03.94 3.84 2.41 5.03-3 1.06-7.41 5.55-7.41 13.47h23c0-7.92-4.41-12.41-7.41-13.47 1.47-1.19 2.41-3 2.41-5.03 0-2.41-1.33-4.5-3.28-5.62.49-.67.78-1.49.78-2.38 0-2.21-1.79-4-4-4z" fill="#fff" stroke="#000" stroke-width="1.5" stroke-linecap="round"/></g>""",  # noqa: E501
+    "Q": """<g id="white-queen" class="white queen" fill="#fff" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M8 12a2 2 0 1 1-4 0 2 2 0 1 1 4 0zM24.5 7.5a2 2 0 1 1-4 0 2 2 0 1 1 4 0zM41 12a2 2 0 1 1-4 0 2 2 0 1 1 4 0zM16 8.5a2 2 0 1 1-4 0 2 2 0 1 1 4 0zM33 9a2 2 0 1 1-4 0 2 2 0 1 1 4 0z"/><path d="M9 26c8.5-1.5 21-1.5 27 0l2-12-7 11V11l-5.5 13.5-3-15-3 15-5.5-14V25L7 14l2 12zM9 26c0 2 1.5 2 2.5 4 1 1.5 1 1 .5 3.5-1.5 1-1.5 2.5-1.5 2.5-1.5 1.5.5 2.5.5 2.5 6.5 1 16.5 1 23 0 0 0 1.5-1 0-2.5 0 0 .5-1.5-1-2.5-.5-2.5-.5-2 .5-3.5 1-2 2.5-2 2.5-4-8.5-1.5-18.5-1.5-27 0z" stroke-linecap="butt"/><path d="M11.5 30c3.5-1 18.5-1 22 0M12 33.5c6-1 15-1 21 0" fill="none"/></g>""",  # noqa: E501
+    "R": """<g id="white-rook" class="white rook" fill="#fff" fill-rule="evenodd" stroke="#000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M9 39h27v-3H9v3zM12 36v-4h21v4H12zM11 14V9h4v2h5V9h5v2h5V9h4v5" stroke-linecap="butt"/><path d="M34 14l-3 3H14l-3-3"/><path d="M31 17v12.5H14V17" stroke-linecap="butt" stroke-linejoin="miter"/><path d="M31 29.5l1.5 2.5h-20l1.5-2.5"/><path d="M11 14h23" fill="none" stroke-linejoin="miter"/></g>""",  # noqa: E501
+}
+
+COORDS = {
+    "1": """<path d="M6.754 26.996h2.578v-8.898l-2.805.562v-1.437l2.79-.563h1.578v10.336h2.578v1.328h-6.72z"/>""",  # noqa: E501
+    "2": """<path d="M8.195 26.996h5.508v1.328H6.297v-1.328q.898-.93 2.445-2.492 1.555-1.57 1.953-2.024.758-.851 1.055-1.437.305-.594.305-1.164 0-.93-.657-1.516-.648-.586-1.695-.586-.742 0-1.57.258-.82.258-1.758.781v-1.593q.953-.383 1.781-.578.828-.196 1.516-.196 1.812 0 2.89.906 1.079.907 1.079 2.422 0 .72-.274 1.368-.265.64-.976 1.515-.196.227-1.243 1.313-1.046 1.078-2.953 3.023z"/>""",  # noqa: E501
+    "3": """<path d="M11.434 22.035q1.132.242 1.765 1.008.64.766.64 1.89 0 1.727-1.187 2.672-1.187.946-3.375.946-.734 0-1.515-.149-.774-.14-1.602-.43V26.45q.656.383 1.438.578.78.196 1.632.196 1.485 0 2.258-.586.782-.586.782-1.703 0-1.032-.727-1.61-.719-.586-2.008-.586h-1.36v-1.297h1.423q1.164 0 1.78-.46.618-.47.618-1.344 0-.899-.64-1.375-.633-.485-1.82-.485-.65 0-1.391.141-.743.14-1.633.437V16.95q.898-.25 1.68-.375.788-.125 1.484-.125 1.797 0 2.844.82 1.046.813 1.046 2.204 0 .968-.554 1.64-.555.664-1.578.922z"/>""",  # noqa: E501
+    "4": """<path d="M11.016 18.035L7.03 24.262h3.985zm-.414-1.375h1.984v7.602h1.664v1.312h-1.664v2.75h-1.57v-2.75H5.75v-1.523z"/>""",  # noqa: E501
+    "5": """<path d="M6.719 16.66h6.195v1.328h-4.75v2.86q.344-.118.688-.172.343-.063.687-.063 1.953 0 3.094 1.07 1.14 1.07 1.14 2.899 0 1.883-1.171 2.93-1.172 1.039-3.305 1.039-.735 0-1.5-.125-.758-.125-1.57-.375v-1.586q.703.383 1.453.57.75.188 1.586.188 1.351 0 2.14-.711.79-.711.79-1.93 0-1.219-.79-1.93-.789-.71-2.14-.71-.633 0-1.266.14-.625.14-1.281.438z"/>""",  # noqa: E501
+    "6": """<path d="M10.137 21.863q-1.063 0-1.688.727-.617.726-.617 1.992 0 1.258.617 1.992.625.727 1.688.727 1.062 0 1.68-.727.624-.734.624-1.992 0-1.266-.625-1.992-.617-.727-1.68-.727zm3.133-4.945v1.437q-.594-.28-1.204-.43-.601-.148-1.195-.148-1.562 0-2.39 1.055-.82 1.055-.938 3.188.46-.68 1.156-1.04.696-.367 1.531-.367 1.758 0 2.774 1.07 1.023 1.063 1.023 2.899 0 1.797-1.062 2.883-1.063 1.086-2.828 1.086-2.024 0-3.094-1.547-1.07-1.555-1.07-4.5 0-2.766 1.312-4.406 1.313-1.649 3.524-1.649.593 0 1.195.117.61.118 1.266.352z"/>""",  # noqa: E501
+    "7": """<path d="M6.25 16.66h7.5v.672L9.516 28.324H7.867l3.985-10.336H6.25z"/>""",  # noqa: E501
+    "8": """<path d="M10 22.785q-1.125 0-1.773.602-.641.601-.641 1.656t.64 1.656q.649.602 1.774.602t1.773-.602q.649-.61.649-1.656 0-1.055-.649-1.656-.64-.602-1.773-.602zm-1.578-.672q-1.016-.25-1.586-.945-.563-.695-.563-1.695 0-1.399.993-2.211 1-.813 2.734-.813 1.742 0 2.734.813.993.812.993 2.21 0 1-.57 1.696-.563.695-1.571.945 1.14.266 1.773 1.04.641.773.641 1.89 0 1.695-1.04 2.602-1.03.906-2.96.906t-2.969-.906Q6 26.738 6 25.043q0-1.117.64-1.89.641-.774 1.782-1.04zm-.578-2.492q0 .906.562 1.414.57.508 1.594.508 1.016 0 1.586-.508.578-.508.578-1.414 0-.906-.578-1.414-.57-.508-1.586-.508-1.023 0-1.594.508-.562.508-.562 1.414z"/>""",  # noqa: E501
+    "a": """<path d="M23.328 10.016q-1.742 0-2.414.398-.672.398-.672 1.36 0 .765.5 1.218.508.445 1.375.445 1.196 0 1.914-.843.727-.852.727-2.258v-.32zm2.867-.594v4.992h-1.437v-1.328q-.492.797-1.227 1.18-.734.375-1.797.375-1.343 0-2.14-.75-.79-.758-.79-2.024 0-1.476.985-2.226.992-.75 2.953-.75h2.016V8.75q0-.992-.656-1.531-.649-.547-1.829-.547-.75 0-1.46.18-.711.18-1.368.539V6.062q.79-.304 1.532-.453.742-.156 1.445-.156 1.898 0 2.836.984.937.985.937 2.985z"/>""",  # noqa: E501
+    "b": """<path d="M24.922 10.047q0-1.586-.656-2.485-.649-.906-1.79-.906-1.14 0-1.796.906-.649.899-.649 2.485 0 1.586.649 2.492.656.898 1.797.898 1.14 0 1.789-.898.656-.906.656-2.492zm-4.89-3.055q.452-.781 1.14-1.156.695-.383 1.656-.383 1.594 0 2.586 1.266 1 1.265 1 3.328 0 2.062-1 3.328-.992 1.266-2.586 1.266-.96 0-1.656-.375-.688-.383-1.14-1.164v1.312h-1.446V2.258h1.445z"/>""",  # noqa: E501
+    "c": """<path d="M25.96 6v1.344q-.608-.336-1.226-.5-.609-.172-1.234-.172-1.398 0-2.172.89-.773.883-.773 2.485 0 1.601.773 2.492.774.883 2.172.883.625 0 1.234-.164.618-.172 1.227-.508v1.328q-.602.281-1.25.422-.64.14-1.367.14-1.977 0-3.14-1.242-1.165-1.242-1.165-3.351 0-2.14 1.172-3.367 1.18-1.227 3.227-1.227.664 0 1.296.14.633.134 1.227.407z"/>""",  # noqa: E501
+    "d": """<path d="M24.973 6.992V2.258h1.437v12.156h-1.437v-1.312q-.453.78-1.149 1.164-.687.375-1.656.375-1.586 0-2.586-1.266-.992-1.266-.992-3.328 0-2.063.992-3.328 1-1.266 2.586-1.266.969 0 1.656.383.696.375 1.149 1.156zm-4.899 3.055q0 1.586.649 2.492.656.898 1.797.898 1.14 0 1.796-.898.657-.906.657-2.492 0-1.586-.657-2.485-.656-.906-1.796-.906-1.141 0-1.797.906-.649.899-.649 2.485z"/>""",  # noqa: E501
+    "e": """<path d="M26.555 9.68v.703h-6.61q.094 1.484.89 2.265.806.774 2.235.774.828 0 1.602-.203.781-.203 1.547-.61v1.36q-.774.328-1.586.5-.813.172-1.649.172-2.093 0-3.32-1.22-1.219-1.218-1.219-3.296 0-2.148 1.157-3.406 1.164-1.266 3.132-1.266 1.766 0 2.79 1.14 1.03 1.134 1.03 3.087zm-1.438-.422q-.015-1.18-.664-1.883-.64-.703-1.703-.703-1.203 0-1.93.68-.718.68-.828 1.914z"/>""",  # noqa: E501
+    "f": """<path d="M25.285 2.258v1.195H23.91q-.773 0-1.078.313-.297.312-.297 1.125v.773h2.367v1.117h-2.367v7.633H21.09V6.781h-1.375V5.664h1.375v-.61q0-1.46.68-2.124.68-.672 2.156-.672z"/>""",  # noqa: E501
+    "g": """<path d="M24.973 9.937q0-1.562-.649-2.421-.64-.86-1.804-.86-1.157 0-1.805.86-.64.859-.64 2.421 0 1.555.64 2.415.648.859 1.805.859 1.164 0 1.804-.86.649-.859.649-2.414zm1.437 3.391q0 2.234-.992 3.32-.992 1.094-3.04 1.094-.757 0-1.429-.117-.672-.11-1.304-.344v-1.398q.632.344 1.25.508.617.164 1.257.164 1.414 0 2.118-.743.703-.734.703-2.226v-.711q-.446.773-1.141 1.156-.695.383-1.664.383-1.61 0-2.594-1.227-.984-1.226-.984-3.25 0-2.03.984-3.257.985-1.227 2.594-1.227.969 0 1.664.383t1.14 1.156V5.664h1.438z"/>""",  # noqa: E501
+    "h": """<path d="M26.164 9.133v5.281h-1.437V9.18q0-1.243-.485-1.86-.484-.617-1.453-.617-1.164 0-1.836.742-.672.742-.672 2.024v4.945h-1.445V2.258h1.445v4.765q.516-.789 1.211-1.18.703-.39 1.617-.39 1.508 0 2.282.938.773.93.773 2.742z"/>""",  # noqa: E501
+}
+
+XX = """<g id="xx"><path d="M35.865 9.135a1.89 1.89 0 0 1 0 2.673L25.173 22.5l10.692 10.692a1.89 1.89 0 0 1 0 2.673 1.89 1.89 0 0 1-2.673 0L22.5 25.173 11.808 35.865a1.89 1.89 0 0 1-2.673 0 1.89 1.89 0 0 1 0-2.673L19.827 22.5 9.135 11.808a1.89 1.89 0 0 1 0-2.673 1.89 1.89 0 0 1 2.673 0L22.5 19.827 33.192 9.135a1.89 1.89 0 0 1 2.673 0z" fill="#000" stroke="#fff" stroke-width="1.688"/></g>"""  # noqa: E501
+
+CHECK_GRADIENT = """<radialGradient id="check_gradient" r="0.5"><stop offset="0%" stop-color="#ff0000" stop-opacity="1.0" /><stop offset="50%" stop-color="#e70000" stop-opacity="1.0" /><stop offset="100%" stop-color="#9e0000" stop-opacity="0.0" /></radialGradient>"""  # noqa: E501
+
+DEFAULT_COLORS = {
+    "square light": "#ffce9e",
+    "square dark": "#d18b47",
+    "square dark lastmove": "#aaa23b",
+    "square light lastmove": "#cdd16a",
+    "margin": "#212121",
+    "inner border": "#111",
+    "outer border": "#111",
+    "coord": "#e5e5e5",
+    "arrow green": "#15781B80",
+    "arrow red": "#88202080",
+    "arrow yellow": "#e68f00b3",
+    "arrow blue": "#00308880",
+}
+
+
+class Arrow:
+    """Details of an arrow to be drawn."""
+
+    tail: Square
+    """Start square of the arrow."""
+
+    head: Square
+    """End square of the arrow."""
+
+    color: str
+    """Arrow color."""
+
+    def __init__(self, tail: Square, head: Square, *, color: str = "green") -> None:
+        self.tail = tail
+        self.head = head
+        self.color = color
+
+    def pgn(self) -> str:
+        """
+        Returns the arrow in the format used by ``[%csl ...]`` and
+        ``[%cal ...]`` PGN annotations, e.g., ``Ga1`` or ``Ya2h2``.
+
+        Colors other than ``red``, ``yellow``, and ``blue`` default to green.
+        """
+        if self.color == "red":
+            color = "R"
+        elif self.color == "yellow":
+            color = "Y"
+        elif self.color == "blue":
+            color = "B"
+        else:
+            color = "G"
+
+        if self.tail == self.head:
+            return f"{color}{chess.SQUARE_NAMES[self.tail]}"
+        else:
+            return f"{color}{chess.SQUARE_NAMES[self.tail]}{chess.SQUARE_NAMES[self.head]}"
+
+    def __str__(self) -> str:
+        return self.pgn()
+
+    def __repr__(self) -> str:
+        return f"Arrow({chess.SQUARE_NAMES[self.tail].upper()}, {chess.SQUARE_NAMES[self.head].upper()}, color={self.color!r})"
+
+    @classmethod
+    def from_pgn(cls, pgn: str) -> Arrow:
+        """
+        Parses an arrow from the format used by ``[%csl ...]`` and
+        ``[%cal ...]`` PGN annotations, e.g., ``Ga1`` or ``Ya2h2``.
+
+        Also allows skipping the color prefix, defaulting to green.
+
+        :raises: :exc:`ValueError` if the format is invalid.
+        """
+        if pgn.startswith("G"):
+            color = "green"
+            pgn = pgn[1:]
+        elif pgn.startswith("R"):
+            color = "red"
+            pgn = pgn[1:]
+        elif pgn.startswith("Y"):
+            color = "yellow"
+            pgn = pgn[1:]
+        elif pgn.startswith("B"):
+            color = "blue"
+            pgn = pgn[1:]
+        else:
+            color = "green"
+
+        tail = chess.parse_square(pgn[:2])
+        head = chess.parse_square(pgn[2:]) if len(pgn) > 2 else tail
+        return cls(tail, head, color=color)
+
+
+class SvgWrapper(str):
+    def _repr_svg_(self) -> SvgWrapper:
+        return self
+
+
+def _svg(viewbox: int, size: Optional[int]) -> ET.Element:
+    svg = ET.Element("svg", {
+        "xmlns": "http://www.w3.org/2000/svg",
+        "xmlns:xlink": "http://www.w3.org/1999/xlink",
+        "viewBox": f"0 0 {viewbox:d} {viewbox:d}",
+    })
+
+    if size is not None:
+        svg.set("width", str(size))
+        svg.set("height", str(size))
+
+    return svg
+
+
+def _attrs(attrs: Dict[str, Union[str, int, float, None]]) -> Dict[str, str]:
+    return {k: str(v) for k, v in attrs.items() if v is not None}
+
+
+def _select_color(colors: Dict[str, str], color: str) -> Tuple[str, float]:
+    return _color(colors.get(color, DEFAULT_COLORS[color]))
+
+
+def _color(color: str) -> Tuple[str, float]:
+    if color.startswith("#"):
+        try:
+            if len(color) == 5:
+                return color[:4], int(color[4], 16) / 0xf
+            elif len(color) == 9:
+                return color[:7], int(color[7:], 16) / 0xff
+        except ValueError:
+            pass  # Ignore invalid hex value
+    return color, 1.0
+
+
+def _coord(text: str, x: int, y: int, width: int, height: int, horizontal: bool, margin: int, *, color: str, opacity: float) -> ET.Element:
+    scale = margin / MARGIN
+
+    if horizontal:
+        x += int(width - scale * width) // 2
+    else:
+        y += int(height - scale * height) // 2
+
+    t = ET.Element("g", _attrs({
+        "transform": f"translate({x}, {y}) scale({scale}, {scale})",
+        "fill": color,
+        "stroke": color,
+        "opacity": opacity if opacity < 1.0 else None,
+    }))
+    t.append(ET.fromstring(COORDS[text]))
+    return t
+
+
+def piece(piece: chess.Piece, size: Optional[int] = None) -> str:
+    """
+    Renders the given :class:`chess.Piece` as an SVG image.
+
+    >>> import chess
+    >>> import chess.svg
+    >>>
+    >>> chess.svg.piece(chess.Piece.from_symbol("R"))  # doctest: +SKIP
+
+    .. image:: ../docs/wR.svg
+        :alt: R
+    """
+    svg = _svg(SQUARE_SIZE, size)
+    svg.append(ET.fromstring(PIECES[piece.symbol()]))
+    return SvgWrapper(ET.tostring(svg).decode("utf-8"))
+
+
+def board(board: Optional[chess.BaseBoard] = None, *,
+          orientation: Color = chess.WHITE,
+          lastmove: Optional[chess.Move] = None,
+          check: Optional[Square] = None,
+          arrows: Iterable[Union[Arrow, Tuple[Square, Square]]] = [],
+          fill: Dict[Square, str] = {},
+          squares: Optional[IntoSquareSet] = None,
+          size: Optional[int] = None,
+          coordinates: bool = True,
+          colors: Dict[str, str] = {},
+          flipped: bool = False,
+          borders: bool = False,
+          style: Optional[str] = None) -> str:
+    """
+    Renders a board with pieces and/or selected squares as an SVG image.
+
+    :param board: A :class:`chess.BaseBoard` for a chessboard with pieces, or
+        ``None`` (the default) for a chessboard without pieces.
+    :param orientation: The point of view, defaulting to ``chess.WHITE``.
+    :param lastmove: A :class:`chess.Move` to be highlighted.
+    :param check: A square to be marked indicating a check.
+    :param arrows: A list of :class:`~chess.svg.Arrow` objects, like
+        ``[chess.svg.Arrow(chess.E2, chess.E4)]``, or a list of tuples, like
+        ``[(chess.E2, chess.E4)]``. An arrow from a square pointing to the same
+        square is drawn as a circle, like ``[(chess.E2, chess.E2)]``.
+    :param fill: A dictionary mapping squares to a colors that they should be
+        filled with.
+    :param squares: A :class:`chess.SquareSet` with selected squares to mark
+        with an X.
+    :param size: The size of the image in pixels (e.g., ``400`` for a 400 by
+        400 board), or ``None`` (the default) for no size limit.
+    :param coordinates: Pass ``False`` to disable the coordinate margin.
+    :param colors: A dictionary to override default colors. Possible keys are
+        ``square light``, ``square dark``, ``square light lastmove``,
+        ``square dark lastmove``, ``margin``, ``coord``, ``inner border``,
+        ``outer border``, ``arrow green``, ``arrow blue``, ``arrow red``,
+        and ``arrow yellow``. Values should look like ``#ffce9e`` (opaque),
+        or ``#15781B80`` (transparent).
+    :param flipped: Pass ``True`` to flip the board.
+    :param borders: Pass ``True`` to enable a border around the board and,
+       (if *coordinates* is enabled) the coordinate margin.
+    :param style: A CSS stylesheet to include in the SVG image.
+
+    >>> import chess
+    >>> import chess.svg
+    >>>
+    >>> board = chess.Board("8/8/8/8/4N3/8/8/8 w - - 0 1")
+    >>>
+    >>> chess.svg.board(
+    ...     board,
+    ...     fill=dict.fromkeys(board.attacks(chess.E4), "#cc0000cc"),
+    ...     arrows=[chess.svg.Arrow(chess.E4, chess.F6, color="#0000cccc")],
+    ...     squares=chess.SquareSet(chess.BB_DARK_SQUARES & chess.BB_FILE_B),
+    ...     size=350,
+    ... )  # doctest: +SKIP
+
+    .. image:: ../docs/Ne4.svg
+        :alt: 8/8/8/8/4N3/8/8/8
+
+    .. deprecated:: 1.1
+        Use *orientation* with a color instead of the *flipped* toggle.
+    """
+    orientation ^= flipped
+    inner_border = 1 if borders and coordinates else 0
+    outer_border = 1 if borders else 0
+    margin = 15 if coordinates else 0
+    full_size = 2 * outer_border + 2 * margin + 2 * inner_border + 8 * SQUARE_SIZE
+    svg = _svg(full_size, size)
+
+    if style:
+        ET.SubElement(svg, "style").text = style
+
+    if board:
+        desc = ET.SubElement(svg, "desc")
+        asciiboard = ET.SubElement(desc, "pre")
+        asciiboard.text = str(board)
+
+    defs = ET.SubElement(svg, "defs")
+    if board:
+        for piece_color in chess.COLORS:
+            for piece_type in chess.PIECE_TYPES:
+                if board.pieces_mask(piece_type, piece_color):
+                    defs.append(ET.fromstring(PIECES[chess.Piece(piece_type, piece_color).symbol()]))
+
+    squares = chess.SquareSet(squares) if squares else chess.SquareSet()
+    if squares:
+        defs.append(ET.fromstring(XX))
+
+    if check is not None:
+        defs.append(ET.fromstring(CHECK_GRADIENT))
+
+    if outer_border:
+        outer_border_color, outer_border_opacity = _select_color(colors, "outer border")
+        ET.SubElement(svg, "rect", _attrs({
+            "x": outer_border / 2,
+            "y": outer_border / 2,
+            "width": full_size - outer_border,
+            "height": full_size - outer_border,
+            "fill": "none",
+            "stroke": outer_border_color,
+            "stroke-width": outer_border,
+            "opacity": outer_border_opacity if outer_border_opacity < 1.0 else None,
+        }))
+
+    if margin:
+        margin_color, margin_opacity = _select_color(colors, "margin")
+        ET.SubElement(svg, "rect", _attrs({
+            "x": outer_border + margin / 2,
+            "y": outer_border + margin / 2,
+            "width": full_size - 2 * outer_border - margin,
+            "height": full_size - 2 * outer_border - margin,
+            "fill": "none",
+            "stroke": margin_color,
+            "stroke-width": margin,
+            "opacity": margin_opacity if margin_opacity < 1.0 else None,
+        }))
+
+    if inner_border:
+        inner_border_color, inner_border_opacity = _select_color(colors, "inner border")
+        ET.SubElement(svg, "rect", _attrs({
+            "x": outer_border + margin + inner_border / 2,
+            "y": outer_border + margin + inner_border / 2,
+            "width": full_size - 2 * outer_border - 2 * margin - inner_border,
+            "height": full_size - 2 * outer_border - 2 * margin - inner_border,
+            "fill": "none",
+            "stroke": inner_border_color,
+            "stroke-width": inner_border,
+            "opacity": inner_border_opacity if inner_border_opacity < 1.0 else None,
+        }))
+
+    # Render coordinates.
+    if coordinates:
+        coord_color, coord_opacity = _select_color(colors, "coord")
+        for file_index, file_name in enumerate(chess.FILE_NAMES):
+            x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + inner_border + margin + outer_border
+            # Keep some padding here to separate the ascender from the border
+            svg.append(_coord(file_name, x, 1, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity))
+            svg.append(_coord(file_name, x, full_size - outer_border - margin, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity))
+        for rank_index, rank_name in enumerate(chess.RANK_NAMES):
+            y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + inner_border + margin + outer_border
+            svg.append(_coord(rank_name, 0, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity))
+            svg.append(_coord(rank_name, full_size - outer_border - margin, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity))
+
+    # Render board.
+    for square, bb in enumerate(chess.BB_SQUARES):
+        file_index = chess.square_file(square)
+        rank_index = chess.square_rank(square)
+
+        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + inner_border + margin + outer_border
+        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + inner_border + margin + outer_border
+
+        cls = ["square", "light" if chess.BB_LIGHT_SQUARES & bb else "dark"]
+        if lastmove and square in [lastmove.from_square, lastmove.to_square]:
+            cls.append("lastmove")
+        square_color, square_opacity = _select_color(colors, " ".join(cls))
+
+        cls.append(chess.SQUARE_NAMES[square])
+
+        ET.SubElement(svg, "rect", _attrs({
+            "x": x,
+            "y": y,
+            "width": SQUARE_SIZE,
+            "height": SQUARE_SIZE,
+            "class": " ".join(cls),
+            "stroke": "none",
+            "fill": square_color,
+            "opacity": square_opacity if square_opacity < 1.0 else None,
+        }))
+
+        try:
+            fill_color, fill_opacity = _color(fill[square])
+        except KeyError:
+            pass
+        else:
+            ET.SubElement(svg, "rect", _attrs({
+                "x": x,
+                "y": y,
+                "width": SQUARE_SIZE,
+                "height": SQUARE_SIZE,
+                "stroke": "none",
+                "fill": fill_color,
+                "opacity": fill_opacity if fill_opacity < 1.0 else None,
+            }))
+
+    # Render check mark.
+    if check is not None:
+        file_index = chess.square_file(check)
+        rank_index = chess.square_rank(check)
+
+        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin
+        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin
+
+        ET.SubElement(svg, "rect", _attrs({
+            "x": x,
+            "y": y,
+            "width": SQUARE_SIZE,
+            "height": SQUARE_SIZE,
+            "class": "check",
+            "fill": "url(#check_gradient)",
+        }))
+
+    # Render pieces and selected squares.
+    for square, bb in enumerate(chess.BB_SQUARES):
+        file_index = chess.square_file(square)
+        rank_index = chess.square_rank(square)
+
+        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin
+        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin
+
+        if board is not None:
+            piece = board.piece_at(square)
+            if piece:
+                href = f"#{chess.COLOR_NAMES[piece.color]}-{chess.PIECE_NAMES[piece.piece_type]}"
+                ET.SubElement(svg, "use", {
+                    "href": href,
+                    "xlink:href": href,
+                    "transform": f"translate({x:d}, {y:d})",
+                })
+
+        # Render selected squares.
+        if squares is not None and square in squares:
+            ET.SubElement(svg, "use", _attrs({
+                "href": "#xx",
+                "xlink:href": "#xx",
+                "x": x,
+                "y": y,
+            }))
+
+    # Render arrows.
+    for arrow in arrows:
+        try:
+            tail, head, color = arrow.tail, arrow.head, arrow.color  # type: ignore
+        except AttributeError:
+            tail, head = arrow  # type: ignore
+            color = "green"
+
+        try:
+            color, opacity = _select_color(colors, " ".join(["arrow", color]))
+        except KeyError:
+            opacity = 1.0
+
+        tail_file = chess.square_file(tail)
+        tail_rank = chess.square_rank(tail)
+        head_file = chess.square_file(head)
+        head_rank = chess.square_rank(head)
+
+        xtail = outer_border + margin + inner_border + (tail_file + 0.5 if orientation else 7.5 - tail_file) * SQUARE_SIZE
+        ytail = outer_border + margin + inner_border + (7.5 - tail_rank if orientation else tail_rank + 0.5) * SQUARE_SIZE
+        xhead = outer_border + margin + inner_border + (head_file + 0.5 if orientation else 7.5 - head_file) * SQUARE_SIZE
+        yhead = outer_border + margin + inner_border + (7.5 - head_rank if orientation else head_rank + 0.5) * SQUARE_SIZE
+
+        if (head_file, head_rank) == (tail_file, tail_rank):
+            ET.SubElement(svg, "circle", _attrs({
+                "cx": xhead,
+                "cy": yhead,
+                "r": SQUARE_SIZE * 0.9 / 2,
+                "stroke-width": SQUARE_SIZE * 0.1,
+                "stroke": color,
+                "opacity": opacity if opacity < 1.0 else None,
+                "fill": "none",
+                "class": "circle",
+            }))
+        else:
+            marker_size = 0.75 * SQUARE_SIZE
+            marker_margin = 0.1 * SQUARE_SIZE
+
+            dx, dy = xhead - xtail, yhead - ytail
+            hypot = math.hypot(dx, dy)
+
+            shaft_x = xhead - dx * (marker_size + marker_margin) / hypot
+            shaft_y = yhead - dy * (marker_size + marker_margin) / hypot
+
+            xtip = xhead - dx * marker_margin / hypot
+            ytip = yhead - dy * marker_margin / hypot
+
+            ET.SubElement(svg, "line", _attrs({
+                "x1": xtail,
+                "y1": ytail,
+                "x2": shaft_x,
+                "y2": shaft_y,
+                "stroke": color,
+                "opacity": opacity if opacity < 1.0 else None,
+                "stroke-width": SQUARE_SIZE * 0.2,
+                "stroke-linecap": "butt",
+                "class": "arrow",
+            }))
+
+            marker = [(xtip, ytip),
+                      (shaft_x + dy * 0.5 * marker_size / hypot,
+                       shaft_y - dx * 0.5 * marker_size / hypot),
+                      (shaft_x - dy * 0.5 * marker_size / hypot,
+                       shaft_y + dx * 0.5 * marker_size / hypot)]
+
+            ET.SubElement(svg, "polygon", _attrs({
+                "points": " ".join(f"{x},{y}" for x, y in marker),
+                "fill": color,
+                "opacity": opacity if opacity < 1.0 else None,
+                "class": "arrow",
+            }))
+
+    return SvgWrapper(ET.tostring(svg).decode("utf-8"))

venv/lib/python3.11/site-packages/distutils-precedence.pth

@@ -0,0 +1 @@
+import os; var = 'SETUPTOOLS_USE_DISTUTILS'; enabled = os.environ.get(var, 'local') == 'local'; enabled and __import__('_distutils_hack').add_shim(); 

venv/lib/python3.11/site-packages/pip-23.0.1.dist-info/INSTALLER

@@ -0,0 +1 @@
+pip

venv/lib/python3.11/site-packages/pip-23.0.1.dist-info/LICENSE.txt

@@ -0,0 +1,20 @@
+Copyright (c) 2008-present The pip developers (see AUTHORS.txt file)
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

venv/lib/python3.11/site-packages/pip-23.0.1.dist-info/METADATA

@@ -0,0 +1,88 @@
+Metadata-Version: 2.1
+Name: pip
+Version: 23.0.1
+Summary: The PyPA recommended tool for installing Python packages.
+Home-page: https://pip.pypa.io/
+Author: The pip developers
+Author-email: distutils-sig@python.org
+License: MIT
+Project-URL: Documentation, https://pip.pypa.io
+Project-URL: Source, https://github.com/pypa/pip
+Project-URL: Changelog, https://pip.pypa.io/en/stable/news/
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Topic :: Software Development :: Build Tools
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3 :: Only
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Requires-Python: >=3.7
+License-File: LICENSE.txt
+
+pip - The Python Package Installer
+==================================
+
+.. image:: https://img.shields.io/pypi/v/pip.svg
+   :target: https://pypi.org/project/pip/
+
+.. image:: https://readthedocs.org/projects/pip/badge/?version=latest
+   :target: https://pip.pypa.io/en/latest
+
+pip is the `package installer`_ for Python. You can use pip to install packages from the `Python Package Index`_ and other indexes.
+
+Please take a look at our documentation for how to install and use pip:
+
+* `Installation`_
+* `Usage`_
+
+We release updates regularly, with a new version every 3 months. Find more details in our documentation:
+
+* `Release notes`_
+* `Release process`_
+
+In pip 20.3, we've `made a big improvement to the heart of pip`_; `learn more`_. We want your input, so `sign up for our user experience research studies`_ to help us do it right.
+
+**Note**: pip 21.0, in January 2021, removed Python 2 support, per pip's `Python 2 support policy`_. Please migrate to Python 3.
+
+If you find bugs, need help, or want to talk to the developers, please use our mailing lists or chat rooms:
+
+* `Issue tracking`_
+* `Discourse channel`_
+* `User IRC`_
+
+If you want to get involved head over to GitHub to get the source code, look at our development documentation and feel free to jump on the developer mailing lists and chat rooms:
+
+* `GitHub page`_
+* `Development documentation`_
+* `Development IRC`_
+
+Code of Conduct
+---------------
+
+Everyone interacting in the pip project's codebases, issue trackers, chat
+rooms, and mailing lists is expected to follow the `PSF Code of Conduct`_.
+
+.. _package installer: https://packaging.python.org/guides/tool-recommendations/
+.. _Python Package Index: https://pypi.org
+.. _Installation: https://pip.pypa.io/en/stable/installation/
+.. _Usage: https://pip.pypa.io/en/stable/
+.. _Release notes: https://pip.pypa.io/en/stable/news.html
+.. _Release process: https://pip.pypa.io/en/latest/development/release-process/
+.. _GitHub page: https://github.com/pypa/pip
+.. _Development documentation: https://pip.pypa.io/en/latest/development
+.. _made a big improvement to the heart of pip: https://pyfound.blogspot.com/2020/11/pip-20-3-new-resolver.html
+.. _learn more: https://pip.pypa.io/en/latest/user_guide/#changes-to-the-pip-dependency-resolver-in-20-3-2020
+.. _sign up for our user experience research studies: https://pyfound.blogspot.com/2020/03/new-pip-resolver-to-roll-out-this-year.html
+.. _Python 2 support policy: https://pip.pypa.io/en/latest/development/release-process/#python-2-support
+.. _Issue tracking: https://github.com/pypa/pip/issues
+.. _Discourse channel: https://discuss.python.org/c/packaging
+.. _User IRC: https://kiwiirc.com/nextclient/#ircs://irc.libera.chat:+6697/pypa
+.. _Development IRC: https://kiwiirc.com/nextclient/#ircs://irc.libera.chat:+6697/pypa-dev
+.. _PSF Code of Conduct: https://github.com/pypa/.github/blob/main/CODE_OF_CONDUCT.md

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venv/lib/python3.11/site-packages/pip-23.0.1.dist-info/WHEEL

@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.38.4)
+Root-Is-Purelib: true
+Tag: py3-none-any
+

venv/lib/python3.11/site-packages/pip-23.0.1.dist-info/entry_points.txt

@@ -0,0 +1,4 @@
+[console_scripts]
+pip = pip._internal.cli.main:main
+pip3 = pip._internal.cli.main:main
+pip3.11 = pip._internal.cli.main:main

venv/lib/python3.11/site-packages/pip-23.0.1.dist-info/top_level.txt

@@ -0,0 +1 @@
+pip

venv/lib/python3.11/site-packages/pip/__init__.py

@@ -0,0 +1,13 @@
+from typing import List, Optional
+
+__version__ = "23.0.1"
+
+
+def main(args: Optional[List[str]] = None) -> int:
+    """This is an internal API only meant for use by pip's own console scripts.
+
+    For additional details, see https://github.com/pypa/pip/issues/7498.
+    """
+    from pip._internal.utils.entrypoints import _wrapper
+
+    return _wrapper(args)

venv/lib/python3.11/site-packages/pip/__main__.py

@@ -0,0 +1,31 @@
+import os
+import sys
+import warnings
+
+# Remove '' and current working directory from the first entry
+# of sys.path, if present to avoid using current directory
+# in pip commands check, freeze, install, list and show,
+# when invoked as python -m pip <command>
+if sys.path[0] in ("", os.getcwd()):
+    sys.path.pop(0)
+
+# If we are running from a wheel, add the wheel to sys.path
+# This allows the usage python pip-*.whl/pip install pip-*.whl
+if __package__ == "":
+    # __file__ is pip-*.whl/pip/__main__.py
+    # first dirname call strips of '/__main__.py', second strips off '/pip'
+    # Resulting path is the name of the wheel itself
+    # Add that to sys.path so we can import pip
+    path = os.path.dirname(os.path.dirname(__file__))
+    sys.path.insert(0, path)
+
+if __name__ == "__main__":
+    # Work around the error reported in #9540, pending a proper fix.
+    # Note: It is essential the warning filter is set *before* importing
+    #       pip, as the deprecation happens at import time, not runtime.
+    warnings.filterwarnings(
+        "ignore", category=DeprecationWarning, module=".*packaging\\.version"
+    )
+    from pip._internal.cli.main import main as _main
+
+    sys.exit(_main())

venv/lib/python3.11/site-packages/pip/__pip-runner__.py

@@ -0,0 +1,50 @@
+"""Execute exactly this copy of pip, within a different environment.
+
+This file is named as it is, to ensure that this module can't be imported via
+an import statement.
+"""
+
+# /!\ This version compatibility check section must be Python 2 compatible. /!\
+
+import sys
+
+# Copied from setup.py
+PYTHON_REQUIRES = (3, 7)
+
+
+def version_str(version):  # type: ignore
+    return ".".join(str(v) for v in version)
+
+
+if sys.version_info[:2] < PYTHON_REQUIRES:
+    raise SystemExit(
+        "This version of pip does not support python {} (requires >={}).".format(
+            version_str(sys.version_info[:2]), version_str(PYTHON_REQUIRES)
+        )
+    )
+
+# From here on, we can use Python 3 features, but the syntax must remain
+# Python 2 compatible.
+
+import runpy  # noqa: E402
+from importlib.machinery import PathFinder  # noqa: E402
+from os.path import dirname  # noqa: E402
+
+PIP_SOURCES_ROOT = dirname(dirname(__file__))
+
+
+class PipImportRedirectingFinder:
+    @classmethod
+    def find_spec(self, fullname, path=None, target=None):  # type: ignore
+        if fullname != "pip":
+            return None
+
+        spec = PathFinder.find_spec(fullname, [PIP_SOURCES_ROOT], target)
+        assert spec, (PIP_SOURCES_ROOT, fullname)
+        return spec
+
+
+sys.meta_path.insert(0, PipImportRedirectingFinder())
+
+assert __name__ == "__main__", "Cannot run __pip-runner__.py as a non-main module"
+runpy.run_module("pip", run_name="__main__", alter_sys=True)

venv/lib/python3.11/site-packages/pip/_internal/__init__.py

@@ -0,0 +1,19 @@
+from typing import List, Optional
+
+import pip._internal.utils.inject_securetransport  # noqa
+from pip._internal.utils import _log
+
+# init_logging() must be called before any call to logging.getLogger()
+# which happens at import of most modules.
+_log.init_logging()
+
+
+def main(args: (Optional[List[str]]) = None) -> int:
+    """This is preserved for old console scripts that may still be referencing
+    it.
+
+    For additional details, see https://github.com/pypa/pip/issues/7498.
+    """
+    from pip._internal.utils.entrypoints import _wrapper
+
+    return _wrapper(args)

venv/lib/python3.11/site-packages/pip/_internal/build_env.py

@@ -0,0 +1,311 @@
+"""Build Environment used for isolation during sdist building
+"""
+
+import logging
+import os
+import pathlib
+import site
+import sys
+import textwrap
+from collections import OrderedDict
+from types import TracebackType
+from typing import TYPE_CHECKING, Iterable, List, Optional, Set, Tuple, Type, Union
+
+from pip._vendor.certifi import where
+from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.version import Version
+
+from pip import __file__ as pip_location
+from pip._internal.cli.spinners import open_spinner
+from pip._internal.locations import get_platlib, get_purelib, get_scheme
+from pip._internal.metadata import get_default_environment, get_environment
+from pip._internal.utils.subprocess import call_subprocess
+from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
+
+if TYPE_CHECKING:
+    from pip._internal.index.package_finder import PackageFinder
+
+logger = logging.getLogger(__name__)
+
+
+def _dedup(a: str, b: str) -> Union[Tuple[str], Tuple[str, str]]:
+    return (a, b) if a != b else (a,)
+
+
+class _Prefix:
+    def __init__(self, path: str) -> None:
+        self.path = path
+        self.setup = False
+        scheme = get_scheme("", prefix=path)
+        self.bin_dir = scheme.scripts
+        self.lib_dirs = _dedup(scheme.purelib, scheme.platlib)
+
+
+def get_runnable_pip() -> str:
+    """Get a file to pass to a Python executable, to run the currently-running pip.
+
+    This is used to run a pip subprocess, for installing requirements into the build
+    environment.
+    """
+    source = pathlib.Path(pip_location).resolve().parent
+
+    if not source.is_dir():
+        # This would happen if someone is using pip from inside a zip file. In that
+        # case, we can use that directly.
+        return str(source)
+
+    return os.fsdecode(source / "__pip-runner__.py")
+
+
+def _get_system_sitepackages() -> Set[str]:
+    """Get system site packages
+
+    Usually from site.getsitepackages,
+    but fallback on `get_purelib()/get_platlib()` if unavailable
+    (e.g. in a virtualenv created by virtualenv<20)
+
+    Returns normalized set of strings.
+    """
+    if hasattr(site, "getsitepackages"):
+        system_sites = site.getsitepackages()
+    else:
+        # virtualenv < 20 overwrites site.py without getsitepackages
+        # fallback on get_purelib/get_platlib.
+        # this is known to miss things, but shouldn't in the cases
+        # where getsitepackages() has been removed (inside a virtualenv)
+        system_sites = [get_purelib(), get_platlib()]
+    return {os.path.normcase(path) for path in system_sites}
+
+
+class BuildEnvironment:
+    """Creates and manages an isolated environment to install build deps"""
+
+    def __init__(self) -> None:
+        temp_dir = TempDirectory(kind=tempdir_kinds.BUILD_ENV, globally_managed=True)
+
+        self._prefixes = OrderedDict(
+            (name, _Prefix(os.path.join(temp_dir.path, name)))
+            for name in ("normal", "overlay")
+        )
+
+        self._bin_dirs: List[str] = []
+        self._lib_dirs: List[str] = []
+        for prefix in reversed(list(self._prefixes.values())):
+            self._bin_dirs.append(prefix.bin_dir)
+            self._lib_dirs.extend(prefix.lib_dirs)
+
+        # Customize site to:
+        # - ensure .pth files are honored
+        # - prevent access to system site packages
+        system_sites = _get_system_sitepackages()
+
+        self._site_dir = os.path.join(temp_dir.path, "site")
+        if not os.path.exists(self._site_dir):
+            os.mkdir(self._site_dir)
+        with open(
+            os.path.join(self._site_dir, "sitecustomize.py"), "w", encoding="utf-8"
+        ) as fp:
+            fp.write(
+                textwrap.dedent(
+                    """
+                import os, site, sys
+
+                # First, drop system-sites related paths.
+                original_sys_path = sys.path[:]
+                known_paths = set()
+                for path in {system_sites!r}:
+                    site.addsitedir(path, known_paths=known_paths)
+                system_paths = set(
+                    os.path.normcase(path)
+                    for path in sys.path[len(original_sys_path):]
+                )
+                original_sys_path = [
+                    path for path in original_sys_path
+                    if os.path.normcase(path) not in system_paths
+                ]
+                sys.path = original_sys_path
+
+                # Second, add lib directories.
+                # ensuring .pth file are processed.
+                for path in {lib_dirs!r}:
+                    assert not path in sys.path
+                    site.addsitedir(path)
+                """
+                ).format(system_sites=system_sites, lib_dirs=self._lib_dirs)
+            )
+
+    def __enter__(self) -> None:
+        self._save_env = {
+            name: os.environ.get(name, None)
+            for name in ("PATH", "PYTHONNOUSERSITE", "PYTHONPATH")
+        }
+
+        path = self._bin_dirs[:]
+        old_path = self._save_env["PATH"]
+        if old_path:
+            path.extend(old_path.split(os.pathsep))
+
+        pythonpath = [self._site_dir]
+
+        os.environ.update(
+            {
+                "PATH": os.pathsep.join(path),
+                "PYTHONNOUSERSITE": "1",
+                "PYTHONPATH": os.pathsep.join(pythonpath),
+            }
+        )
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        for varname, old_value in self._save_env.items():
+            if old_value is None:
+                os.environ.pop(varname, None)
+            else:
+                os.environ[varname] = old_value
+
+    def check_requirements(
+        self, reqs: Iterable[str]
+    ) -> Tuple[Set[Tuple[str, str]], Set[str]]:
+        """Return 2 sets:
+        - conflicting requirements: set of (installed, wanted) reqs tuples
+        - missing requirements: set of reqs
+        """
+        missing = set()
+        conflicting = set()
+        if reqs:
+            env = (
+                get_environment(self._lib_dirs)
+                if hasattr(self, "_lib_dirs")
+                else get_default_environment()
+            )
+            for req_str in reqs:
+                req = Requirement(req_str)
+                # We're explicitly evaluating with an empty extra value, since build
+                # environments are not provided any mechanism to select specific extras.
+                if req.marker is not None and not req.marker.evaluate({"extra": ""}):
+                    continue
+                dist = env.get_distribution(req.name)
+                if not dist:
+                    missing.add(req_str)
+                    continue
+                if isinstance(dist.version, Version):
+                    installed_req_str = f"{req.name}=={dist.version}"
+                else:
+                    installed_req_str = f"{req.name}==={dist.version}"
+                if not req.specifier.contains(dist.version, prereleases=True):
+                    conflicting.add((installed_req_str, req_str))
+                # FIXME: Consider direct URL?
+        return conflicting, missing
+
+    def install_requirements(
+        self,
+        finder: "PackageFinder",
+        requirements: Iterable[str],
+        prefix_as_string: str,
+        *,
+        kind: str,
+    ) -> None:
+        prefix = self._prefixes[prefix_as_string]
+        assert not prefix.setup
+        prefix.setup = True
+        if not requirements:
+            return
+        self._install_requirements(
+            get_runnable_pip(),
+            finder,
+            requirements,
+            prefix,
+            kind=kind,
+        )
+
+    @staticmethod
+    def _install_requirements(
+        pip_runnable: str,
+        finder: "PackageFinder",
+        requirements: Iterable[str],
+        prefix: _Prefix,
+        *,
+        kind: str,
+    ) -> None:
+        args: List[str] = [
+            sys.executable,
+            pip_runnable,
+            "install",
+            "--ignore-installed",
+            "--no-user",
+            "--prefix",
+            prefix.path,
+            "--no-warn-script-location",
+        ]
+        if logger.getEffectiveLevel() <= logging.DEBUG:
+            args.append("-v")
+        for format_control in ("no_binary", "only_binary"):
+            formats = getattr(finder.format_control, format_control)
+            args.extend(
+                (
+                    "--" + format_control.replace("_", "-"),
+                    ",".join(sorted(formats or {":none:"})),
+                )
+            )
+
+        index_urls = finder.index_urls
+        if index_urls:
+            args.extend(["-i", index_urls[0]])
+            for extra_index in index_urls[1:]:
+                args.extend(["--extra-index-url", extra_index])
+        else:
+            args.append("--no-index")
+        for link in finder.find_links:
+            args.extend(["--find-links", link])
+
+        for host in finder.trusted_hosts:
+            args.extend(["--trusted-host", host])
+        if finder.allow_all_prereleases:
+            args.append("--pre")
+        if finder.prefer_binary:
+            args.append("--prefer-binary")
+        args.append("--")
+        args.extend(requirements)
+        extra_environ = {"_PIP_STANDALONE_CERT": where()}
+        with open_spinner(f"Installing {kind}") as spinner:
+            call_subprocess(
+                args,
+                command_desc=f"pip subprocess to install {kind}",
+                spinner=spinner,
+                extra_environ=extra_environ,
+            )
+
+
+class NoOpBuildEnvironment(BuildEnvironment):
+    """A no-op drop-in replacement for BuildEnvironment"""
+
+    def __init__(self) -> None:
+        pass
+
+    def __enter__(self) -> None:
+        pass
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        pass
+
+    def cleanup(self) -> None:
+        pass
+
+    def install_requirements(
+        self,
+        finder: "PackageFinder",
+        requirements: Iterable[str],
+        prefix_as_string: str,
+        *,
+        kind: str,
+    ) -> None:
+        raise NotImplementedError()

venv/lib/python3.11/site-packages/pip/_internal/cache.py

@@ -0,0 +1,293 @@
+"""Cache Management
+"""
+
+import hashlib
+import json
+import logging
+import os
+from pathlib import Path
+from typing import Any, Dict, List, Optional, Set
+
+from pip._vendor.packaging.tags import Tag, interpreter_name, interpreter_version
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.exceptions import InvalidWheelFilename
+from pip._internal.models.direct_url import DirectUrl
+from pip._internal.models.format_control import FormatControl
+from pip._internal.models.link import Link
+from pip._internal.models.wheel import Wheel
+from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
+from pip._internal.utils.urls import path_to_url
+
+logger = logging.getLogger(__name__)
+
+ORIGIN_JSON_NAME = "origin.json"
+
+
+def _hash_dict(d: Dict[str, str]) -> str:
+    """Return a stable sha224 of a dictionary."""
+    s = json.dumps(d, sort_keys=True, separators=(",", ":"), ensure_ascii=True)
+    return hashlib.sha224(s.encode("ascii")).hexdigest()
+
+
+class Cache:
+    """An abstract class - provides cache directories for data from links
+
+
+    :param cache_dir: The root of the cache.
+    :param format_control: An object of FormatControl class to limit
+        binaries being read from the cache.
+    :param allowed_formats: which formats of files the cache should store.
+        ('binary' and 'source' are the only allowed values)
+    """
+
+    def __init__(
+        self, cache_dir: str, format_control: FormatControl, allowed_formats: Set[str]
+    ) -> None:
+        super().__init__()
+        assert not cache_dir or os.path.isabs(cache_dir)
+        self.cache_dir = cache_dir or None
+        self.format_control = format_control
+        self.allowed_formats = allowed_formats
+
+        _valid_formats = {"source", "binary"}
+        assert self.allowed_formats.union(_valid_formats) == _valid_formats
+
+    def _get_cache_path_parts(self, link: Link) -> List[str]:
+        """Get parts of part that must be os.path.joined with cache_dir"""
+
+        # We want to generate an url to use as our cache key, we don't want to
+        # just re-use the URL because it might have other items in the fragment
+        # and we don't care about those.
+        key_parts = {"url": link.url_without_fragment}
+        if link.hash_name is not None and link.hash is not None:
+            key_parts[link.hash_name] = link.hash
+        if link.subdirectory_fragment:
+            key_parts["subdirectory"] = link.subdirectory_fragment
+
+        # Include interpreter name, major and minor version in cache key
+        # to cope with ill-behaved sdists that build a different wheel
+        # depending on the python version their setup.py is being run on,
+        # and don't encode the difference in compatibility tags.
+        # https://github.com/pypa/pip/issues/7296
+        key_parts["interpreter_name"] = interpreter_name()
+        key_parts["interpreter_version"] = interpreter_version()
+
+        # Encode our key url with sha224, we'll use this because it has similar
+        # security properties to sha256, but with a shorter total output (and
+        # thus less secure). However the differences don't make a lot of
+        # difference for our use case here.
+        hashed = _hash_dict(key_parts)
+
+        # We want to nest the directories some to prevent having a ton of top
+        # level directories where we might run out of sub directories on some
+        # FS.
+        parts = [hashed[:2], hashed[2:4], hashed[4:6], hashed[6:]]
+
+        return parts
+
+    def _get_candidates(self, link: Link, canonical_package_name: str) -> List[Any]:
+        can_not_cache = not self.cache_dir or not canonical_package_name or not link
+        if can_not_cache:
+            return []
+
+        formats = self.format_control.get_allowed_formats(canonical_package_name)
+        if not self.allowed_formats.intersection(formats):
+            return []
+
+        candidates = []
+        path = self.get_path_for_link(link)
+        if os.path.isdir(path):
+            for candidate in os.listdir(path):
+                candidates.append((candidate, path))
+        return candidates
+
+    def get_path_for_link(self, link: Link) -> str:
+        """Return a directory to store cached items in for link."""
+        raise NotImplementedError()
+
+    def get(
+        self,
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Link:
+        """Returns a link to a cached item if it exists, otherwise returns the
+        passed link.
+        """
+        raise NotImplementedError()
+
+
+class SimpleWheelCache(Cache):
+    """A cache of wheels for future installs."""
+
+    def __init__(self, cache_dir: str, format_control: FormatControl) -> None:
+        super().__init__(cache_dir, format_control, {"binary"})
+
+    def get_path_for_link(self, link: Link) -> str:
+        """Return a directory to store cached wheels for link
+
+        Because there are M wheels for any one sdist, we provide a directory
+        to cache them in, and then consult that directory when looking up
+        cache hits.
+
+        We only insert things into the cache if they have plausible version
+        numbers, so that we don't contaminate the cache with things that were
+        not unique. E.g. ./package might have dozens of installs done for it
+        and build a version of 0.0...and if we built and cached a wheel, we'd
+        end up using the same wheel even if the source has been edited.
+
+        :param link: The link of the sdist for which this will cache wheels.
+        """
+        parts = self._get_cache_path_parts(link)
+        assert self.cache_dir
+        # Store wheels within the root cache_dir
+        return os.path.join(self.cache_dir, "wheels", *parts)
+
+    def get(
+        self,
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Link:
+        candidates = []
+
+        if not package_name:
+            return link
+
+        canonical_package_name = canonicalize_name(package_name)
+        for wheel_name, wheel_dir in self._get_candidates(link, canonical_package_name):
+            try:
+                wheel = Wheel(wheel_name)
+            except InvalidWheelFilename:
+                continue
+            if canonicalize_name(wheel.name) != canonical_package_name:
+                logger.debug(
+                    "Ignoring cached wheel %s for %s as it "
+                    "does not match the expected distribution name %s.",
+                    wheel_name,
+                    link,
+                    package_name,
+                )
+                continue
+            if not wheel.supported(supported_tags):
+                # Built for a different python/arch/etc
+                continue
+            candidates.append(
+                (
+                    wheel.support_index_min(supported_tags),
+                    wheel_name,
+                    wheel_dir,
+                )
+            )
+
+        if not candidates:
+            return link
+
+        _, wheel_name, wheel_dir = min(candidates)
+        return Link(path_to_url(os.path.join(wheel_dir, wheel_name)))
+
+
+class EphemWheelCache(SimpleWheelCache):
+    """A SimpleWheelCache that creates it's own temporary cache directory"""
+
+    def __init__(self, format_control: FormatControl) -> None:
+        self._temp_dir = TempDirectory(
+            kind=tempdir_kinds.EPHEM_WHEEL_CACHE,
+            globally_managed=True,
+        )
+
+        super().__init__(self._temp_dir.path, format_control)
+
+
+class CacheEntry:
+    def __init__(
+        self,
+        link: Link,
+        persistent: bool,
+    ):
+        self.link = link
+        self.persistent = persistent
+        self.origin: Optional[DirectUrl] = None
+        origin_direct_url_path = Path(self.link.file_path).parent / ORIGIN_JSON_NAME
+        if origin_direct_url_path.exists():
+            self.origin = DirectUrl.from_json(origin_direct_url_path.read_text())
+
+
+class WheelCache(Cache):
+    """Wraps EphemWheelCache and SimpleWheelCache into a single Cache
+
+    This Cache allows for gracefully degradation, using the ephem wheel cache
+    when a certain link is not found in the simple wheel cache first.
+    """
+
+    def __init__(
+        self, cache_dir: str, format_control: Optional[FormatControl] = None
+    ) -> None:
+        if format_control is None:
+            format_control = FormatControl()
+        super().__init__(cache_dir, format_control, {"binary"})
+        self._wheel_cache = SimpleWheelCache(cache_dir, format_control)
+        self._ephem_cache = EphemWheelCache(format_control)
+
+    def get_path_for_link(self, link: Link) -> str:
+        return self._wheel_cache.get_path_for_link(link)
+
+    def get_ephem_path_for_link(self, link: Link) -> str:
+        return self._ephem_cache.get_path_for_link(link)
+
+    def get(
+        self,
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Link:
+        cache_entry = self.get_cache_entry(link, package_name, supported_tags)
+        if cache_entry is None:
+            return link
+        return cache_entry.link
+
+    def get_cache_entry(
+        self,
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Optional[CacheEntry]:
+        """Returns a CacheEntry with a link to a cached item if it exists or
+        None. The cache entry indicates if the item was found in the persistent
+        or ephemeral cache.
+        """
+        retval = self._wheel_cache.get(
+            link=link,
+            package_name=package_name,
+            supported_tags=supported_tags,
+        )
+        if retval is not link:
+            return CacheEntry(retval, persistent=True)
+
+        retval = self._ephem_cache.get(
+            link=link,
+            package_name=package_name,
+            supported_tags=supported_tags,
+        )
+        if retval is not link:
+            return CacheEntry(retval, persistent=False)
+
+        return None
+
+    @staticmethod
+    def record_download_origin(cache_dir: str, download_info: DirectUrl) -> None:
+        origin_path = Path(cache_dir) / ORIGIN_JSON_NAME
+        if origin_path.is_file():
+            origin = DirectUrl.from_json(origin_path.read_text())
+            # TODO: use DirectUrl.equivalent when https://github.com/pypa/pip/pull/10564
+            # is merged.
+            if origin.url != download_info.url:
+                logger.warning(
+                    "Origin URL %s in cache entry %s does not match download URL %s. "
+                    "This is likely a pip bug or a cache corruption issue.",
+                    origin.url,
+                    cache_dir,
+                    download_info.url,
+                )
+        origin_path.write_text(download_info.to_json(), encoding="utf-8")

venv/lib/python3.11/site-packages/pip/_internal/cli/__init__.py

@@ -0,0 +1,4 @@
+"""Subpackage containing all of pip's command line interface related code
+"""
+
+# This file intentionally does not import submodules

venv/lib/python3.11/site-packages/pip/_internal/cli/autocompletion.py

@@ -0,0 +1,171 @@
+"""Logic that powers autocompletion installed by ``pip completion``.
+"""
+
+import optparse
+import os
+import sys
+from itertools import chain
+from typing import Any, Iterable, List, Optional
+
+from pip._internal.cli.main_parser import create_main_parser
+from pip._internal.commands import commands_dict, create_command
+from pip._internal.metadata import get_default_environment
+
+
+def autocomplete() -> None:
+    """Entry Point for completion of main and subcommand options."""
+    # Don't complete if user hasn't sourced bash_completion file.
+    if "PIP_AUTO_COMPLETE" not in os.environ:
+        return
+    cwords = os.environ["COMP_WORDS"].split()[1:]
+    cword = int(os.environ["COMP_CWORD"])
+    try:
+        current = cwords[cword - 1]
+    except IndexError:
+        current = ""
+
+    parser = create_main_parser()
+    subcommands = list(commands_dict)
+    options = []
+
+    # subcommand
+    subcommand_name: Optional[str] = None
+    for word in cwords:
+        if word in subcommands:
+            subcommand_name = word
+            break
+    # subcommand options
+    if subcommand_name is not None:
+        # special case: 'help' subcommand has no options
+        if subcommand_name == "help":
+            sys.exit(1)
+        # special case: list locally installed dists for show and uninstall
+        should_list_installed = not current.startswith("-") and subcommand_name in [
+            "show",
+            "uninstall",
+        ]
+        if should_list_installed:
+            env = get_default_environment()
+            lc = current.lower()
+            installed = [
+                dist.canonical_name
+                for dist in env.iter_installed_distributions(local_only=True)
+                if dist.canonical_name.startswith(lc)
+                and dist.canonical_name not in cwords[1:]
+            ]
+            # if there are no dists installed, fall back to option completion
+            if installed:
+                for dist in installed:
+                    print(dist)
+                sys.exit(1)
+
+        should_list_installables = (
+            not current.startswith("-") and subcommand_name == "install"
+        )
+        if should_list_installables:
+            for path in auto_complete_paths(current, "path"):
+                print(path)
+            sys.exit(1)
+
+        subcommand = create_command(subcommand_name)
+
+        for opt in subcommand.parser.option_list_all:
+            if opt.help != optparse.SUPPRESS_HELP:
+                for opt_str in opt._long_opts + opt._short_opts:
+                    options.append((opt_str, opt.nargs))
+
+        # filter out previously specified options from available options
+        prev_opts = [x.split("=")[0] for x in cwords[1 : cword - 1]]
+        options = [(x, v) for (x, v) in options if x not in prev_opts]
+        # filter options by current input
+        options = [(k, v) for k, v in options if k.startswith(current)]
+        # get completion type given cwords and available subcommand options
+        completion_type = get_path_completion_type(
+            cwords,
+            cword,
+            subcommand.parser.option_list_all,
+        )
+        # get completion files and directories if ``completion_type`` is
+        # ``<file>``, ``<dir>`` or ``<path>``
+        if completion_type:
+            paths = auto_complete_paths(current, completion_type)
+            options = [(path, 0) for path in paths]
+        for option in options:
+            opt_label = option[0]
+            # append '=' to options which require args
+            if option[1] and option[0][:2] == "--":
+                opt_label += "="
+            print(opt_label)
+    else:
+        # show main parser options only when necessary
+
+        opts = [i.option_list for i in parser.option_groups]
+        opts.append(parser.option_list)
+        flattened_opts = chain.from_iterable(opts)
+        if current.startswith("-"):
+            for opt in flattened_opts:
+                if opt.help != optparse.SUPPRESS_HELP:
+                    subcommands += opt._long_opts + opt._short_opts
+        else:
+            # get completion type given cwords and all available options
+            completion_type = get_path_completion_type(cwords, cword, flattened_opts)
+            if completion_type:
+                subcommands = list(auto_complete_paths(current, completion_type))
+
+        print(" ".join([x for x in subcommands if x.startswith(current)]))
+    sys.exit(1)
+
+
+def get_path_completion_type(
+    cwords: List[str], cword: int, opts: Iterable[Any]
+) -> Optional[str]:
+    """Get the type of path completion (``file``, ``dir``, ``path`` or None)
+
+    :param cwords: same as the environmental variable ``COMP_WORDS``
+    :param cword: same as the environmental variable ``COMP_CWORD``
+    :param opts: The available options to check
+    :return: path completion type (``file``, ``dir``, ``path`` or None)
+    """
+    if cword < 2 or not cwords[cword - 2].startswith("-"):
+        return None
+    for opt in opts:
+        if opt.help == optparse.SUPPRESS_HELP:
+            continue
+        for o in str(opt).split("/"):
+            if cwords[cword - 2].split("=")[0] == o:
+                if not opt.metavar or any(
+                    x in ("path", "file", "dir") for x in opt.metavar.split("/")
+                ):
+                    return opt.metavar
+    return None
+
+
+def auto_complete_paths(current: str, completion_type: str) -> Iterable[str]:
+    """If ``completion_type`` is ``file`` or ``path``, list all regular files
+    and directories starting with ``current``; otherwise only list directories
+    starting with ``current``.
+
+    :param current: The word to be completed
+    :param completion_type: path completion type(``file``, ``path`` or ``dir``)
+    :return: A generator of regular files and/or directories
+    """
+    directory, filename = os.path.split(current)
+    current_path = os.path.abspath(directory)
+    # Don't complete paths if they can't be accessed
+    if not os.access(current_path, os.R_OK):
+        return
+    filename = os.path.normcase(filename)
+    # list all files that start with ``filename``
+    file_list = (
+        x for x in os.listdir(current_path) if os.path.normcase(x).startswith(filename)
+    )
+    for f in file_list:
+        opt = os.path.join(current_path, f)
+        comp_file = os.path.normcase(os.path.join(directory, f))
+        # complete regular files when there is not ``<dir>`` after option
+        # complete directories when there is ``<file>``, ``<path>`` or
+        # ``<dir>``after option
+        if completion_type != "dir" and os.path.isfile(opt):
+            yield comp_file
+        elif os.path.isdir(opt):
+            yield os.path.join(comp_file, "")

venv/lib/python3.11/site-packages/pip/_internal/cli/base_command.py

@@ -0,0 +1,216 @@
+"""Base Command class, and related routines"""
+
+import functools
+import logging
+import logging.config
+import optparse
+import os
+import sys
+import traceback
+from optparse import Values
+from typing import Any, Callable, List, Optional, Tuple
+
+from pip._vendor.rich import traceback as rich_traceback
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.command_context import CommandContextMixIn
+from pip._internal.cli.parser import ConfigOptionParser, UpdatingDefaultsHelpFormatter
+from pip._internal.cli.status_codes import (
+    ERROR,
+    PREVIOUS_BUILD_DIR_ERROR,
+    UNKNOWN_ERROR,
+    VIRTUALENV_NOT_FOUND,
+)
+from pip._internal.exceptions import (
+    BadCommand,
+    CommandError,
+    DiagnosticPipError,
+    InstallationError,
+    NetworkConnectionError,
+    PreviousBuildDirError,
+    UninstallationError,
+)
+from pip._internal.utils.filesystem import check_path_owner
+from pip._internal.utils.logging import BrokenStdoutLoggingError, setup_logging
+from pip._internal.utils.misc import get_prog, normalize_path
+from pip._internal.utils.temp_dir import TempDirectoryTypeRegistry as TempDirRegistry
+from pip._internal.utils.temp_dir import global_tempdir_manager, tempdir_registry
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+__all__ = ["Command"]
+
+logger = logging.getLogger(__name__)
+
+
+class Command(CommandContextMixIn):
+    usage: str = ""
+    ignore_require_venv: bool = False
+
+    def __init__(self, name: str, summary: str, isolated: bool = False) -> None:
+        super().__init__()
+
+        self.name = name
+        self.summary = summary
+        self.parser = ConfigOptionParser(
+            usage=self.usage,
+            prog=f"{get_prog()} {name}",
+            formatter=UpdatingDefaultsHelpFormatter(),
+            add_help_option=False,
+            name=name,
+            description=self.__doc__,
+            isolated=isolated,
+        )
+
+        self.tempdir_registry: Optional[TempDirRegistry] = None
+
+        # Commands should add options to this option group
+        optgroup_name = f"{self.name.capitalize()} Options"
+        self.cmd_opts = optparse.OptionGroup(self.parser, optgroup_name)
+
+        # Add the general options
+        gen_opts = cmdoptions.make_option_group(
+            cmdoptions.general_group,
+            self.parser,
+        )
+        self.parser.add_option_group(gen_opts)
+
+        self.add_options()
+
+    def add_options(self) -> None:
+        pass
+
+    def handle_pip_version_check(self, options: Values) -> None:
+        """
+        This is a no-op so that commands by default do not do the pip version
+        check.
+        """
+        # Make sure we do the pip version check if the index_group options
+        # are present.
+        assert not hasattr(options, "no_index")
+
+    def run(self, options: Values, args: List[str]) -> int:
+        raise NotImplementedError
+
+    def parse_args(self, args: List[str]) -> Tuple[Values, List[str]]:
+        # factored out for testability
+        return self.parser.parse_args(args)
+
+    def main(self, args: List[str]) -> int:
+        try:
+            with self.main_context():
+                return self._main(args)
+        finally:
+            logging.shutdown()
+
+    def _main(self, args: List[str]) -> int:
+        # We must initialize this before the tempdir manager, otherwise the
+        # configuration would not be accessible by the time we clean up the
+        # tempdir manager.
+        self.tempdir_registry = self.enter_context(tempdir_registry())
+        # Intentionally set as early as possible so globally-managed temporary
+        # directories are available to the rest of the code.
+        self.enter_context(global_tempdir_manager())
+
+        options, args = self.parse_args(args)
+
+        # Set verbosity so that it can be used elsewhere.
+        self.verbosity = options.verbose - options.quiet
+
+        level_number = setup_logging(
+            verbosity=self.verbosity,
+            no_color=options.no_color,
+            user_log_file=options.log,
+        )
+
+        # TODO: Try to get these passing down from the command?
+        #       without resorting to os.environ to hold these.
+        #       This also affects isolated builds and it should.
+
+        if options.no_input:
+            os.environ["PIP_NO_INPUT"] = "1"
+
+        if options.exists_action:
+            os.environ["PIP_EXISTS_ACTION"] = " ".join(options.exists_action)
+
+        if options.require_venv and not self.ignore_require_venv:
+            # If a venv is required check if it can really be found
+            if not running_under_virtualenv():
+                logger.critical("Could not find an activated virtualenv (required).")
+                sys.exit(VIRTUALENV_NOT_FOUND)
+
+        if options.cache_dir:
+            options.cache_dir = normalize_path(options.cache_dir)
+            if not check_path_owner(options.cache_dir):
+                logger.warning(
+                    "The directory '%s' or its parent directory is not owned "
+                    "or is not writable by the current user. The cache "
+                    "has been disabled. Check the permissions and owner of "
+                    "that directory. If executing pip with sudo, you should "
+                    "use sudo's -H flag.",
+                    options.cache_dir,
+                )
+                options.cache_dir = None
+
+        def intercepts_unhandled_exc(
+            run_func: Callable[..., int]
+        ) -> Callable[..., int]:
+            @functools.wraps(run_func)
+            def exc_logging_wrapper(*args: Any) -> int:
+                try:
+                    status = run_func(*args)
+                    assert isinstance(status, int)
+                    return status
+                except DiagnosticPipError as exc:
+                    logger.error("[present-rich] %s", exc)
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return ERROR
+                except PreviousBuildDirError as exc:
+                    logger.critical(str(exc))
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return PREVIOUS_BUILD_DIR_ERROR
+                except (
+                    InstallationError,
+                    UninstallationError,
+                    BadCommand,
+                    NetworkConnectionError,
+                ) as exc:
+                    logger.critical(str(exc))
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return ERROR
+                except CommandError as exc:
+                    logger.critical("%s", exc)
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return ERROR
+                except BrokenStdoutLoggingError:
+                    # Bypass our logger and write any remaining messages to
+                    # stderr because stdout no longer works.
+                    print("ERROR: Pipe to stdout was broken", file=sys.stderr)
+                    if level_number <= logging.DEBUG:
+                        traceback.print_exc(file=sys.stderr)
+
+                    return ERROR
+                except KeyboardInterrupt:
+                    logger.critical("Operation cancelled by user")
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return ERROR
+                except BaseException:
+                    logger.critical("Exception:", exc_info=True)
+
+                    return UNKNOWN_ERROR
+
+            return exc_logging_wrapper
+
+        try:
+            if not options.debug_mode:
+                run = intercepts_unhandled_exc(self.run)
+            else:
+                run = self.run
+                rich_traceback.install(show_locals=True)
+            return run(options, args)
+        finally:
+            self.handle_pip_version_check(options)

venv/lib/python3.11/site-packages/pip/_internal/cli/command_context.py

@@ -0,0 +1,27 @@
+from contextlib import ExitStack, contextmanager
+from typing import ContextManager, Generator, TypeVar
+
+_T = TypeVar("_T", covariant=True)
+
+
+class CommandContextMixIn:
+    def __init__(self) -> None:
+        super().__init__()
+        self._in_main_context = False
+        self._main_context = ExitStack()
+
+    @contextmanager
+    def main_context(self) -> Generator[None, None, None]:
+        assert not self._in_main_context
+
+        self._in_main_context = True
+        try:
+            with self._main_context:
+                yield
+        finally:
+            self._in_main_context = False
+
+    def enter_context(self, context_provider: ContextManager[_T]) -> _T:
+        assert self._in_main_context
+
+        return self._main_context.enter_context(context_provider)

venv/lib/python3.11/site-packages/pip/_internal/cli/main.py

@@ -0,0 +1,70 @@
+"""Primary application entrypoint.
+"""
+import locale
+import logging
+import os
+import sys
+from typing import List, Optional
+
+from pip._internal.cli.autocompletion import autocomplete
+from pip._internal.cli.main_parser import parse_command
+from pip._internal.commands import create_command
+from pip._internal.exceptions import PipError
+from pip._internal.utils import deprecation
+
+logger = logging.getLogger(__name__)
+
+
+# Do not import and use main() directly! Using it directly is actively
+# discouraged by pip's maintainers. The name, location and behavior of
+# this function is subject to change, so calling it directly is not
+# portable across different pip versions.
+
+# In addition, running pip in-process is unsupported and unsafe. This is
+# elaborated in detail at
+# https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program.
+# That document also provides suggestions that should work for nearly
+# all users that are considering importing and using main() directly.
+
+# However, we know that certain users will still want to invoke pip
+# in-process. If you understand and accept the implications of using pip
+# in an unsupported manner, the best approach is to use runpy to avoid
+# depending on the exact location of this entry point.
+
+# The following example shows how to use runpy to invoke pip in that
+# case:
+#
+#     sys.argv = ["pip", your, args, here]
+#     runpy.run_module("pip", run_name="__main__")
+#
+# Note that this will exit the process after running, unlike a direct
+# call to main. As it is not safe to do any processing after calling
+# main, this should not be an issue in practice.
+
+
+def main(args: Optional[List[str]] = None) -> int:
+    if args is None:
+        args = sys.argv[1:]
+
+    # Configure our deprecation warnings to be sent through loggers
+    deprecation.install_warning_logger()
+
+    autocomplete()
+
+    try:
+        cmd_name, cmd_args = parse_command(args)
+    except PipError as exc:
+        sys.stderr.write(f"ERROR: {exc}")
+        sys.stderr.write(os.linesep)
+        sys.exit(1)
+
+    # Needed for locale.getpreferredencoding(False) to work
+    # in pip._internal.utils.encoding.auto_decode
+    try:
+        locale.setlocale(locale.LC_ALL, "")
+    except locale.Error as e:
+        # setlocale can apparently crash if locale are uninitialized
+        logger.debug("Ignoring error %s when setting locale", e)
+    command = create_command(cmd_name, isolated=("--isolated" in cmd_args))
+
+    return command.main(cmd_args)

venv/lib/python3.11/site-packages/pip/_internal/cli/main_parser.py

@@ -0,0 +1,134 @@
+"""A single place for constructing and exposing the main parser
+"""
+
+import os
+import subprocess
+import sys
+from typing import List, Optional, Tuple
+
+from pip._internal.build_env import get_runnable_pip
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.parser import ConfigOptionParser, UpdatingDefaultsHelpFormatter
+from pip._internal.commands import commands_dict, get_similar_commands
+from pip._internal.exceptions import CommandError
+from pip._internal.utils.misc import get_pip_version, get_prog
+
+__all__ = ["create_main_parser", "parse_command"]
+
+
+def create_main_parser() -> ConfigOptionParser:
+    """Creates and returns the main parser for pip's CLI"""
+
+    parser = ConfigOptionParser(
+        usage="\n%prog <command> [options]",
+        add_help_option=False,
+        formatter=UpdatingDefaultsHelpFormatter(),
+        name="global",
+        prog=get_prog(),
+    )
+    parser.disable_interspersed_args()
+
+    parser.version = get_pip_version()
+
+    # add the general options
+    gen_opts = cmdoptions.make_option_group(cmdoptions.general_group, parser)
+    parser.add_option_group(gen_opts)
+
+    # so the help formatter knows
+    parser.main = True  # type: ignore
+
+    # create command listing for description
+    description = [""] + [
+        f"{name:27} {command_info.summary}"
+        for name, command_info in commands_dict.items()
+    ]
+    parser.description = "\n".join(description)
+
+    return parser
+
+
+def identify_python_interpreter(python: str) -> Optional[str]:
+    # If the named file exists, use it.
+    # If it's a directory, assume it's a virtual environment and
+    # look for the environment's Python executable.
+    if os.path.exists(python):
+        if os.path.isdir(python):
+            # bin/python for Unix, Scripts/python.exe for Windows
+            # Try both in case of odd cases like cygwin.
+            for exe in ("bin/python", "Scripts/python.exe"):
+                py = os.path.join(python, exe)
+                if os.path.exists(py):
+                    return py
+        else:
+            return python
+
+    # Could not find the interpreter specified
+    return None
+
+
+def parse_command(args: List[str]) -> Tuple[str, List[str]]:
+    parser = create_main_parser()
+
+    # Note: parser calls disable_interspersed_args(), so the result of this
+    # call is to split the initial args into the general options before the
+    # subcommand and everything else.
+    # For example:
+    #  args: ['--timeout=5', 'install', '--user', 'INITools']
+    #  general_options: ['--timeout==5']
+    #  args_else: ['install', '--user', 'INITools']
+    general_options, args_else = parser.parse_args(args)
+
+    # --python
+    if general_options.python and "_PIP_RUNNING_IN_SUBPROCESS" not in os.environ:
+        # Re-invoke pip using the specified Python interpreter
+        interpreter = identify_python_interpreter(general_options.python)
+        if interpreter is None:
+            raise CommandError(
+                f"Could not locate Python interpreter {general_options.python}"
+            )
+
+        pip_cmd = [
+            interpreter,
+            get_runnable_pip(),
+        ]
+        pip_cmd.extend(args)
+
+        # Set a flag so the child doesn't re-invoke itself, causing
+        # an infinite loop.
+        os.environ["_PIP_RUNNING_IN_SUBPROCESS"] = "1"
+        returncode = 0
+        try:
+            proc = subprocess.run(pip_cmd)
+            returncode = proc.returncode
+        except (subprocess.SubprocessError, OSError) as exc:
+            raise CommandError(f"Failed to run pip under {interpreter}: {exc}")
+        sys.exit(returncode)
+
+    # --version
+    if general_options.version:
+        sys.stdout.write(parser.version)
+        sys.stdout.write(os.linesep)
+        sys.exit()
+
+    # pip || pip help -> print_help()
+    if not args_else or (args_else[0] == "help" and len(args_else) == 1):
+        parser.print_help()
+        sys.exit()
+
+    # the subcommand name
+    cmd_name = args_else[0]
+
+    if cmd_name not in commands_dict:
+        guess = get_similar_commands(cmd_name)
+
+        msg = [f'unknown command "{cmd_name}"']
+        if guess:
+            msg.append(f'maybe you meant "{guess}"')
+
+        raise CommandError(" - ".join(msg))
+
+    # all the args without the subcommand
+    cmd_args = args[:]
+    cmd_args.remove(cmd_name)
+
+    return cmd_name, cmd_args

venv/lib/python3.11/site-packages/pip/_internal/cli/parser.py

@@ -0,0 +1,294 @@
+"""Base option parser setup"""
+
+import logging
+import optparse
+import shutil
+import sys
+import textwrap
+from contextlib import suppress
+from typing import Any, Dict, Generator, List, Tuple
+
+from pip._internal.cli.status_codes import UNKNOWN_ERROR
+from pip._internal.configuration import Configuration, ConfigurationError
+from pip._internal.utils.misc import redact_auth_from_url, strtobool
+
+logger = logging.getLogger(__name__)
+
+
+class PrettyHelpFormatter(optparse.IndentedHelpFormatter):
+    """A prettier/less verbose help formatter for optparse."""
+
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        # help position must be aligned with __init__.parseopts.description
+        kwargs["max_help_position"] = 30
+        kwargs["indent_increment"] = 1
+        kwargs["width"] = shutil.get_terminal_size()[0] - 2
+        super().__init__(*args, **kwargs)
+
+    def format_option_strings(self, option: optparse.Option) -> str:
+        return self._format_option_strings(option)
+
+    def _format_option_strings(
+        self, option: optparse.Option, mvarfmt: str = " <{}>", optsep: str = ", "
+    ) -> str:
+        """
+        Return a comma-separated list of option strings and metavars.
+
+        :param option:  tuple of (short opt, long opt), e.g: ('-f', '--format')
+        :param mvarfmt: metavar format string
+        :param optsep:  separator
+        """
+        opts = []
+
+        if option._short_opts:
+            opts.append(option._short_opts[0])
+        if option._long_opts:
+            opts.append(option._long_opts[0])
+        if len(opts) > 1:
+            opts.insert(1, optsep)
+
+        if option.takes_value():
+            assert option.dest is not None
+            metavar = option.metavar or option.dest.lower()
+            opts.append(mvarfmt.format(metavar.lower()))
+
+        return "".join(opts)
+
+    def format_heading(self, heading: str) -> str:
+        if heading == "Options":
+            return ""
+        return heading + ":\n"
+
+    def format_usage(self, usage: str) -> str:
+        """
+        Ensure there is only one newline between usage and the first heading
+        if there is no description.
+        """
+        msg = "\nUsage: {}\n".format(self.indent_lines(textwrap.dedent(usage), "  "))
+        return msg
+
+    def format_description(self, description: str) -> str:
+        # leave full control over description to us
+        if description:
+            if hasattr(self.parser, "main"):
+                label = "Commands"
+            else:
+                label = "Description"
+            # some doc strings have initial newlines, some don't
+            description = description.lstrip("\n")
+            # some doc strings have final newlines and spaces, some don't
+            description = description.rstrip()
+            # dedent, then reindent
+            description = self.indent_lines(textwrap.dedent(description), "  ")
+            description = f"{label}:\n{description}\n"
+            return description
+        else:
+            return ""
+
+    def format_epilog(self, epilog: str) -> str:
+        # leave full control over epilog to us
+        if epilog:
+            return epilog
+        else:
+            return ""
+
+    def indent_lines(self, text: str, indent: str) -> str:
+        new_lines = [indent + line for line in text.split("\n")]
+        return "\n".join(new_lines)
+
+
+class UpdatingDefaultsHelpFormatter(PrettyHelpFormatter):
+    """Custom help formatter for use in ConfigOptionParser.
+
+    This is updates the defaults before expanding them, allowing
+    them to show up correctly in the help listing.
+
+    Also redact auth from url type options
+    """
+
+    def expand_default(self, option: optparse.Option) -> str:
+        default_values = None
+        if self.parser is not None:
+            assert isinstance(self.parser, ConfigOptionParser)
+            self.parser._update_defaults(self.parser.defaults)
+            assert option.dest is not None
+            default_values = self.parser.defaults.get(option.dest)
+        help_text = super().expand_default(option)
+
+        if default_values and option.metavar == "URL":
+            if isinstance(default_values, str):
+                default_values = [default_values]
+
+            # If its not a list, we should abort and just return the help text
+            if not isinstance(default_values, list):
+                default_values = []
+
+            for val in default_values:
+                help_text = help_text.replace(val, redact_auth_from_url(val))
+
+        return help_text
+
+
+class CustomOptionParser(optparse.OptionParser):
+    def insert_option_group(
+        self, idx: int, *args: Any, **kwargs: Any
+    ) -> optparse.OptionGroup:
+        """Insert an OptionGroup at a given position."""
+        group = self.add_option_group(*args, **kwargs)
+
+        self.option_groups.pop()
+        self.option_groups.insert(idx, group)
+
+        return group
+
+    @property
+    def option_list_all(self) -> List[optparse.Option]:
+        """Get a list of all options, including those in option groups."""
+        res = self.option_list[:]
+        for i in self.option_groups:
+            res.extend(i.option_list)
+
+        return res
+
+
+class ConfigOptionParser(CustomOptionParser):
+    """Custom option parser which updates its defaults by checking the
+    configuration files and environmental variables"""
+
+    def __init__(
+        self,
+        *args: Any,
+        name: str,
+        isolated: bool = False,
+        **kwargs: Any,
+    ) -> None:
+        self.name = name
+        self.config = Configuration(isolated)
+
+        assert self.name
+        super().__init__(*args, **kwargs)
+
+    def check_default(self, option: optparse.Option, key: str, val: Any) -> Any:
+        try:
+            return option.check_value(key, val)
+        except optparse.OptionValueError as exc:
+            print(f"An error occurred during configuration: {exc}")
+            sys.exit(3)
+
+    def _get_ordered_configuration_items(
+        self,
+    ) -> Generator[Tuple[str, Any], None, None]:
+        # Configuration gives keys in an unordered manner. Order them.
+        override_order = ["global", self.name, ":env:"]
+
+        # Pool the options into different groups
+        section_items: Dict[str, List[Tuple[str, Any]]] = {
+            name: [] for name in override_order
+        }
+        for section_key, val in self.config.items():
+            # ignore empty values
+            if not val:
+                logger.debug(
+                    "Ignoring configuration key '%s' as it's value is empty.",
+                    section_key,
+                )
+                continue
+
+            section, key = section_key.split(".", 1)
+            if section in override_order:
+                section_items[section].append((key, val))
+
+        # Yield each group in their override order
+        for section in override_order:
+            for key, val in section_items[section]:
+                yield key, val
+
+    def _update_defaults(self, defaults: Dict[str, Any]) -> Dict[str, Any]:
+        """Updates the given defaults with values from the config files and
+        the environ. Does a little special handling for certain types of
+        options (lists)."""
+
+        # Accumulate complex default state.
+        self.values = optparse.Values(self.defaults)
+        late_eval = set()
+        # Then set the options with those values
+        for key, val in self._get_ordered_configuration_items():
+            # '--' because configuration supports only long names
+            option = self.get_option("--" + key)
+
+            # Ignore options not present in this parser. E.g. non-globals put
+            # in [global] by users that want them to apply to all applicable
+            # commands.
+            if option is None:
+                continue
+
+            assert option.dest is not None
+
+            if option.action in ("store_true", "store_false"):
+                try:
+                    val = strtobool(val)
+                except ValueError:
+                    self.error(
+                        "{} is not a valid value for {} option, "  # noqa
+                        "please specify a boolean value like yes/no, "
+                        "true/false or 1/0 instead.".format(val, key)
+                    )
+            elif option.action == "count":
+                with suppress(ValueError):
+                    val = strtobool(val)
+                with suppress(ValueError):
+                    val = int(val)
+                if not isinstance(val, int) or val < 0:
+                    self.error(
+                        "{} is not a valid value for {} option, "  # noqa
+                        "please instead specify either a non-negative integer "
+                        "or a boolean value like yes/no or false/true "
+                        "which is equivalent to 1/0.".format(val, key)
+                    )
+            elif option.action == "append":
+                val = val.split()
+                val = [self.check_default(option, key, v) for v in val]
+            elif option.action == "callback":
+                assert option.callback is not None
+                late_eval.add(option.dest)
+                opt_str = option.get_opt_string()
+                val = option.convert_value(opt_str, val)
+                # From take_action
+                args = option.callback_args or ()
+                kwargs = option.callback_kwargs or {}
+                option.callback(option, opt_str, val, self, *args, **kwargs)
+            else:
+                val = self.check_default(option, key, val)
+
+            defaults[option.dest] = val
+
+        for key in late_eval:
+            defaults[key] = getattr(self.values, key)
+        self.values = None
+        return defaults
+
+    def get_default_values(self) -> optparse.Values:
+        """Overriding to make updating the defaults after instantiation of
+        the option parser possible, _update_defaults() does the dirty work."""
+        if not self.process_default_values:
+            # Old, pre-Optik 1.5 behaviour.
+            return optparse.Values(self.defaults)
+
+        # Load the configuration, or error out in case of an error
+        try:
+            self.config.load()
+        except ConfigurationError as err:
+            self.exit(UNKNOWN_ERROR, str(err))
+
+        defaults = self._update_defaults(self.defaults.copy())  # ours
+        for option in self._get_all_options():
+            assert option.dest is not None
+            default = defaults.get(option.dest)
+            if isinstance(default, str):
+                opt_str = option.get_opt_string()
+                defaults[option.dest] = option.check_value(opt_str, default)
+        return optparse.Values(defaults)
+
+    def error(self, msg: str) -> None:
+        self.print_usage(sys.stderr)
+        self.exit(UNKNOWN_ERROR, f"{msg}\n")

venv/lib/python3.11/site-packages/pip/_internal/cli/progress_bars.py

@@ -0,0 +1,68 @@
+import functools
+from typing import Callable, Generator, Iterable, Iterator, Optional, Tuple
+
+from pip._vendor.rich.progress import (
+    BarColumn,
+    DownloadColumn,
+    FileSizeColumn,
+    Progress,
+    ProgressColumn,
+    SpinnerColumn,
+    TextColumn,
+    TimeElapsedColumn,
+    TimeRemainingColumn,
+    TransferSpeedColumn,
+)
+
+from pip._internal.utils.logging import get_indentation
+
+DownloadProgressRenderer = Callable[[Iterable[bytes]], Iterator[bytes]]
+
+
+def _rich_progress_bar(
+    iterable: Iterable[bytes],
+    *,
+    bar_type: str,
+    size: int,
+) -> Generator[bytes, None, None]:
+    assert bar_type == "on", "This should only be used in the default mode."
+
+    if not size:
+        total = float("inf")
+        columns: Tuple[ProgressColumn, ...] = (
+            TextColumn("[progress.description]{task.description}"),
+            SpinnerColumn("line", speed=1.5),
+            FileSizeColumn(),
+            TransferSpeedColumn(),
+            TimeElapsedColumn(),
+        )
+    else:
+        total = size
+        columns = (
+            TextColumn("[progress.description]{task.description}"),
+            BarColumn(),
+            DownloadColumn(),
+            TransferSpeedColumn(),
+            TextColumn("eta"),
+            TimeRemainingColumn(),
+        )
+
+    progress = Progress(*columns, refresh_per_second=30)
+    task_id = progress.add_task(" " * (get_indentation() + 2), total=total)
+    with progress:
+        for chunk in iterable:
+            yield chunk
+            progress.update(task_id, advance=len(chunk))
+
+
+def get_download_progress_renderer(
+    *, bar_type: str, size: Optional[int] = None
+) -> DownloadProgressRenderer:
+    """Get an object that can be used to render the download progress.
+
+    Returns a callable, that takes an iterable to "wrap".
+    """
+    if bar_type == "on":
+        return functools.partial(_rich_progress_bar, bar_type=bar_type, size=size)
+    else:
+        return iter  # no-op, when passed an iterator

venv/lib/python3.11/site-packages/pip/_internal/cli/req_command.py

@@ -0,0 +1,502 @@
+"""Contains the Command base classes that depend on PipSession.
+
+The classes in this module are in a separate module so the commands not
+needing download / PackageFinder capability don't unnecessarily import the
+PackageFinder machinery and all its vendored dependencies, etc.
+"""
+
+import logging
+import os
+import sys
+from functools import partial
+from optparse import Values
+from typing import TYPE_CHECKING, Any, List, Optional, Tuple
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.command_context import CommandContextMixIn
+from pip._internal.exceptions import CommandError, PreviousBuildDirError
+from pip._internal.index.collector import LinkCollector
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.models.target_python import TargetPython
+from pip._internal.network.session import PipSession
+from pip._internal.operations.build.build_tracker import BuildTracker
+from pip._internal.operations.prepare import RequirementPreparer
+from pip._internal.req.constructors import (
+    install_req_from_editable,
+    install_req_from_line,
+    install_req_from_parsed_requirement,
+    install_req_from_req_string,
+)
+from pip._internal.req.req_file import parse_requirements
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.resolution.base import BaseResolver
+from pip._internal.self_outdated_check import pip_self_version_check
+from pip._internal.utils.temp_dir import (
+    TempDirectory,
+    TempDirectoryTypeRegistry,
+    tempdir_kinds,
+)
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+if TYPE_CHECKING:
+    from ssl import SSLContext
+
+logger = logging.getLogger(__name__)
+
+
+def _create_truststore_ssl_context() -> Optional["SSLContext"]:
+    if sys.version_info < (3, 10):
+        raise CommandError("The truststore feature is only available for Python 3.10+")
+
+    try:
+        import ssl
+    except ImportError:
+        logger.warning("Disabling truststore since ssl support is missing")
+        return None
+
+    try:
+        import truststore
+    except ImportError:
+        raise CommandError(
+            "To use the truststore feature, 'truststore' must be installed into "
+            "pip's current environment."
+        )
+
+    return truststore.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+
+
+class SessionCommandMixin(CommandContextMixIn):
+
+    """
+    A class mixin for command classes needing _build_session().
+    """
+
+    def __init__(self) -> None:
+        super().__init__()
+        self._session: Optional[PipSession] = None
+
+    @classmethod
+    def _get_index_urls(cls, options: Values) -> Optional[List[str]]:
+        """Return a list of index urls from user-provided options."""
+        index_urls = []
+        if not getattr(options, "no_index", False):
+            url = getattr(options, "index_url", None)
+            if url:
+                index_urls.append(url)
+        urls = getattr(options, "extra_index_urls", None)
+        if urls:
+            index_urls.extend(urls)
+        # Return None rather than an empty list
+        return index_urls or None
+
+    def get_default_session(self, options: Values) -> PipSession:
+        """Get a default-managed session."""
+        if self._session is None:
+            self._session = self.enter_context(self._build_session(options))
+            # there's no type annotation on requests.Session, so it's
+            # automatically ContextManager[Any] and self._session becomes Any,
+            # then https://github.com/python/mypy/issues/7696 kicks in
+            assert self._session is not None
+        return self._session
+
+    def _build_session(
+        self,
+        options: Values,
+        retries: Optional[int] = None,
+        timeout: Optional[int] = None,
+        fallback_to_certifi: bool = False,
+    ) -> PipSession:
+        cache_dir = options.cache_dir
+        assert not cache_dir or os.path.isabs(cache_dir)
+
+        if "truststore" in options.features_enabled:
+            try:
+                ssl_context = _create_truststore_ssl_context()
+            except Exception:
+                if not fallback_to_certifi:
+                    raise
+                ssl_context = None
+        else:
+            ssl_context = None
+
+        session = PipSession(
+            cache=os.path.join(cache_dir, "http") if cache_dir else None,
+            retries=retries if retries is not None else options.retries,
+            trusted_hosts=options.trusted_hosts,
+            index_urls=self._get_index_urls(options),
+            ssl_context=ssl_context,
+        )
+
+        # Handle custom ca-bundles from the user
+        if options.cert:
+            session.verify = options.cert
+
+        # Handle SSL client certificate
+        if options.client_cert:
+            session.cert = options.client_cert
+
+        # Handle timeouts
+        if options.timeout or timeout:
+            session.timeout = timeout if timeout is not None else options.timeout
+
+        # Handle configured proxies
+        if options.proxy:
+            session.proxies = {
+                "http": options.proxy,
+                "https": options.proxy,
+            }
+
+        # Determine if we can prompt the user for authentication or not
+        session.auth.prompting = not options.no_input
+
+        return session
+
+
+class IndexGroupCommand(Command, SessionCommandMixin):
+
+    """
+    Abstract base class for commands with the index_group options.
+
+    This also corresponds to the commands that permit the pip version check.
+    """
+
+    def handle_pip_version_check(self, options: Values) -> None:
+        """
+        Do the pip version check if not disabled.
+
+        This overrides the default behavior of not doing the check.
+        """
+        # Make sure the index_group options are present.
+        assert hasattr(options, "no_index")
+
+        if options.disable_pip_version_check or options.no_index:
+            return
+
+        # Otherwise, check if we're using the latest version of pip available.
+        session = self._build_session(
+            options,
+            retries=0,
+            timeout=min(5, options.timeout),
+            # This is set to ensure the function does not fail when truststore is
+            # specified in use-feature but cannot be loaded. This usually raises a
+            # CommandError and shows a nice user-facing error, but this function is not
+            # called in that try-except block.
+            fallback_to_certifi=True,
+        )
+        with session:
+            pip_self_version_check(session, options)
+
+
+KEEPABLE_TEMPDIR_TYPES = [
+    tempdir_kinds.BUILD_ENV,
+    tempdir_kinds.EPHEM_WHEEL_CACHE,
+    tempdir_kinds.REQ_BUILD,
+]
+
+
+def warn_if_run_as_root() -> None:
+    """Output a warning for sudo users on Unix.
+
+    In a virtual environment, sudo pip still writes to virtualenv.
+    On Windows, users may run pip as Administrator without issues.
+    This warning only applies to Unix root users outside of virtualenv.
+    """
+    if running_under_virtualenv():
+        return
+    if not hasattr(os, "getuid"):
+        return
+    # On Windows, there are no "system managed" Python packages. Installing as
+    # Administrator via pip is the correct way of updating system environments.
+    #
+    # We choose sys.platform over utils.compat.WINDOWS here to enable Mypy platform
+    # checks: https://mypy.readthedocs.io/en/stable/common_issues.html
+    if sys.platform == "win32" or sys.platform == "cygwin":
+        return
+
+    if os.getuid() != 0:
+        return
+
+    logger.warning(
+        "Running pip as the 'root' user can result in broken permissions and "
+        "conflicting behaviour with the system package manager. "
+        "It is recommended to use a virtual environment instead: "
+        "https://pip.pypa.io/warnings/venv"
+    )
+
+
+def with_cleanup(func: Any) -> Any:
+    """Decorator for common logic related to managing temporary
+    directories.
+    """
+
+    def configure_tempdir_registry(registry: TempDirectoryTypeRegistry) -> None:
+        for t in KEEPABLE_TEMPDIR_TYPES:
+            registry.set_delete(t, False)
+
+    def wrapper(
+        self: RequirementCommand, options: Values, args: List[Any]
+    ) -> Optional[int]:
+        assert self.tempdir_registry is not None
+        if options.no_clean:
+            configure_tempdir_registry(self.tempdir_registry)
+
+        try:
+            return func(self, options, args)
+        except PreviousBuildDirError:
+            # This kind of conflict can occur when the user passes an explicit
+            # build directory with a pre-existing folder. In that case we do
+            # not want to accidentally remove it.
+            configure_tempdir_registry(self.tempdir_registry)
+            raise
+
+    return wrapper
+
+
+class RequirementCommand(IndexGroupCommand):
+    def __init__(self, *args: Any, **kw: Any) -> None:
+        super().__init__(*args, **kw)
+
+        self.cmd_opts.add_option(cmdoptions.no_clean())
+
+    @staticmethod
+    def determine_resolver_variant(options: Values) -> str:
+        """Determines which resolver should be used, based on the given options."""
+        if "legacy-resolver" in options.deprecated_features_enabled:
+            return "legacy"
+
+        return "2020-resolver"
+
+    @classmethod
+    def make_requirement_preparer(
+        cls,
+        temp_build_dir: TempDirectory,
+        options: Values,
+        build_tracker: BuildTracker,
+        session: PipSession,
+        finder: PackageFinder,
+        use_user_site: bool,
+        download_dir: Optional[str] = None,
+        verbosity: int = 0,
+    ) -> RequirementPreparer:
+        """
+        Create a RequirementPreparer instance for the given parameters.
+        """
+        temp_build_dir_path = temp_build_dir.path
+        assert temp_build_dir_path is not None
+
+        resolver_variant = cls.determine_resolver_variant(options)
+        if resolver_variant == "2020-resolver":
+            lazy_wheel = "fast-deps" in options.features_enabled
+            if lazy_wheel:
+                logger.warning(
+                    "pip is using lazily downloaded wheels using HTTP "
+                    "range requests to obtain dependency information. "
+                    "This experimental feature is enabled through "
+                    "--use-feature=fast-deps and it is not ready for "
+                    "production."
+                )
+        else:
+            lazy_wheel = False
+            if "fast-deps" in options.features_enabled:
+                logger.warning(
+                    "fast-deps has no effect when used with the legacy resolver."
+                )
+
+        return RequirementPreparer(
+            build_dir=temp_build_dir_path,
+            src_dir=options.src_dir,
+            download_dir=download_dir,
+            build_isolation=options.build_isolation,
+            check_build_deps=options.check_build_deps,
+            build_tracker=build_tracker,
+            session=session,
+            progress_bar=options.progress_bar,
+            finder=finder,
+            require_hashes=options.require_hashes,
+            use_user_site=use_user_site,
+            lazy_wheel=lazy_wheel,
+            verbosity=verbosity,
+        )
+
+    @classmethod
+    def make_resolver(
+        cls,
+        preparer: RequirementPreparer,
+        finder: PackageFinder,
+        options: Values,
+        wheel_cache: Optional[WheelCache] = None,
+        use_user_site: bool = False,
+        ignore_installed: bool = True,
+        ignore_requires_python: bool = False,
+        force_reinstall: bool = False,
+        upgrade_strategy: str = "to-satisfy-only",
+        use_pep517: Optional[bool] = None,
+        py_version_info: Optional[Tuple[int, ...]] = None,
+    ) -> BaseResolver:
+        """
+        Create a Resolver instance for the given parameters.
+        """
+        make_install_req = partial(
+            install_req_from_req_string,
+            isolated=options.isolated_mode,
+            use_pep517=use_pep517,
+            config_settings=getattr(options, "config_settings", None),
+        )
+        resolver_variant = cls.determine_resolver_variant(options)
+        # The long import name and duplicated invocation is needed to convince
+        # Mypy into correctly typechecking. Otherwise it would complain the
+        # "Resolver" class being redefined.
+        if resolver_variant == "2020-resolver":
+            import pip._internal.resolution.resolvelib.resolver
+
+            return pip._internal.resolution.resolvelib.resolver.Resolver(
+                preparer=preparer,
+                finder=finder,
+                wheel_cache=wheel_cache,
+                make_install_req=make_install_req,
+                use_user_site=use_user_site,
+                ignore_dependencies=options.ignore_dependencies,
+                ignore_installed=ignore_installed,
+                ignore_requires_python=ignore_requires_python,
+                force_reinstall=force_reinstall,
+                upgrade_strategy=upgrade_strategy,
+                py_version_info=py_version_info,
+            )
+        import pip._internal.resolution.legacy.resolver
+
+        return pip._internal.resolution.legacy.resolver.Resolver(
+            preparer=preparer,
+            finder=finder,
+            wheel_cache=wheel_cache,
+            make_install_req=make_install_req,
+            use_user_site=use_user_site,
+            ignore_dependencies=options.ignore_dependencies,
+            ignore_installed=ignore_installed,
+            ignore_requires_python=ignore_requires_python,
+            force_reinstall=force_reinstall,
+            upgrade_strategy=upgrade_strategy,
+            py_version_info=py_version_info,
+        )
+
+    def get_requirements(
+        self,
+        args: List[str],
+        options: Values,
+        finder: PackageFinder,
+        session: PipSession,
+    ) -> List[InstallRequirement]:
+        """
+        Parse command-line arguments into the corresponding requirements.
+        """
+        requirements: List[InstallRequirement] = []
+        for filename in options.constraints:
+            for parsed_req in parse_requirements(
+                filename,
+                constraint=True,
+                finder=finder,
+                options=options,
+                session=session,
+            ):
+                req_to_add = install_req_from_parsed_requirement(
+                    parsed_req,
+                    isolated=options.isolated_mode,
+                    user_supplied=False,
+                )
+                requirements.append(req_to_add)
+
+        for req in args:
+            req_to_add = install_req_from_line(
+                req,
+                None,
+                isolated=options.isolated_mode,
+                use_pep517=options.use_pep517,
+                user_supplied=True,
+                config_settings=getattr(options, "config_settings", None),
+            )
+            requirements.append(req_to_add)
+
+        for req in options.editables:
+            req_to_add = install_req_from_editable(
+                req,
+                user_supplied=True,
+                isolated=options.isolated_mode,
+                use_pep517=options.use_pep517,
+                config_settings=getattr(options, "config_settings", None),
+            )
+            requirements.append(req_to_add)
+
+        # NOTE: options.require_hashes may be set if --require-hashes is True
+        for filename in options.requirements:
+            for parsed_req in parse_requirements(
+                filename, finder=finder, options=options, session=session
+            ):
+                req_to_add = install_req_from_parsed_requirement(
+                    parsed_req,
+                    isolated=options.isolated_mode,
+                    use_pep517=options.use_pep517,
+                    user_supplied=True,
+                )
+                requirements.append(req_to_add)
+
+        # If any requirement has hash options, enable hash checking.
+        if any(req.has_hash_options for req in requirements):
+            options.require_hashes = True
+
+        if not (args or options.editables or options.requirements):
+            opts = {"name": self.name}
+            if options.find_links:
+                raise CommandError(
+                    "You must give at least one requirement to {name} "
+                    '(maybe you meant "pip {name} {links}"?)'.format(
+                        **dict(opts, links=" ".join(options.find_links))
+                    )
+                )
+            else:
+                raise CommandError(
+                    "You must give at least one requirement to {name} "
+                    '(see "pip help {name}")'.format(**opts)
+                )
+
+        return requirements
+
+    @staticmethod
+    def trace_basic_info(finder: PackageFinder) -> None:
+        """
+        Trace basic information about the provided objects.
+        """
+        # Display where finder is looking for packages
+        search_scope = finder.search_scope
+        locations = search_scope.get_formatted_locations()
+        if locations:
+            logger.info(locations)
+
+    def _build_package_finder(
+        self,
+        options: Values,
+        session: PipSession,
+        target_python: Optional[TargetPython] = None,
+        ignore_requires_python: Optional[bool] = None,
+    ) -> PackageFinder:
+        """
+        Create a package finder appropriate to this requirement command.
+
+        :param ignore_requires_python: Whether to ignore incompatible
+            "Requires-Python" values in links. Defaults to False.
+        """
+        link_collector = LinkCollector.create(session, options=options)
+        selection_prefs = SelectionPreferences(
+            allow_yanked=True,
+            format_control=options.format_control,
+            allow_all_prereleases=options.pre,
+            prefer_binary=options.prefer_binary,
+            ignore_requires_python=ignore_requires_python,
+        )
+
+        return PackageFinder.create(
+            link_collector=link_collector,
+            selection_prefs=selection_prefs,
+            target_python=target_python,
+        )

venv/lib/python3.11/site-packages/pip/_internal/cli/spinners.py

@@ -0,0 +1,159 @@
+import contextlib
+import itertools
+import logging
+import sys
+import time
+from typing import IO, Generator, Optional
+
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.logging import get_indentation
+
+logger = logging.getLogger(__name__)
+
+
+class SpinnerInterface:
+    def spin(self) -> None:
+        raise NotImplementedError()
+
+    def finish(self, final_status: str) -> None:
+        raise NotImplementedError()
+
+
+class InteractiveSpinner(SpinnerInterface):
+    def __init__(
+        self,
+        message: str,
+        file: Optional[IO[str]] = None,
+        spin_chars: str = "-\\|/",
+        # Empirically, 8 updates/second looks nice
+        min_update_interval_seconds: float = 0.125,
+    ):
+        self._message = message
+        if file is None:
+            file = sys.stdout
+        self._file = file
+        self._rate_limiter = RateLimiter(min_update_interval_seconds)
+        self._finished = False
+
+        self._spin_cycle = itertools.cycle(spin_chars)
+
+        self._file.write(" " * get_indentation() + self._message + " ... ")
+        self._width = 0
+
+    def _write(self, status: str) -> None:
+        assert not self._finished
+        # Erase what we wrote before by backspacing to the beginning, writing
+        # spaces to overwrite the old text, and then backspacing again
+        backup = "\b" * self._width
+        self._file.write(backup + " " * self._width + backup)
+        # Now we have a blank slate to add our status
+        self._file.write(status)
+        self._width = len(status)
+        self._file.flush()
+        self._rate_limiter.reset()
+
+    def spin(self) -> None:
+        if self._finished:
+            return
+        if not self._rate_limiter.ready():
+            return
+        self._write(next(self._spin_cycle))
+
+    def finish(self, final_status: str) -> None:
+        if self._finished:
+            return
+        self._write(final_status)
+        self._file.write("\n")
+        self._file.flush()
+        self._finished = True
+
+
+# Used for dumb terminals, non-interactive installs (no tty), etc.
+# We still print updates occasionally (once every 60 seconds by default) to
+# act as a keep-alive for systems like Travis-CI that take lack-of-output as
+# an indication that a task has frozen.
+class NonInteractiveSpinner(SpinnerInterface):
+    def __init__(self, message: str, min_update_interval_seconds: float = 60.0) -> None:
+        self._message = message
+        self._finished = False
+        self._rate_limiter = RateLimiter(min_update_interval_seconds)
+        self._update("started")
+
+    def _update(self, status: str) -> None:
+        assert not self._finished
+        self._rate_limiter.reset()
+        logger.info("%s: %s", self._message, status)
+
+    def spin(self) -> None:
+        if self._finished:
+            return
+        if not self._rate_limiter.ready():
+            return
+        self._update("still running...")
+
+    def finish(self, final_status: str) -> None:
+        if self._finished:
+            return
+        self._update(f"finished with status '{final_status}'")
+        self._finished = True
+
+
+class RateLimiter:
+    def __init__(self, min_update_interval_seconds: float) -> None:
+        self._min_update_interval_seconds = min_update_interval_seconds
+        self._last_update: float = 0
+
+    def ready(self) -> bool:
+        now = time.time()
+        delta = now - self._last_update
+        return delta >= self._min_update_interval_seconds
+
+    def reset(self) -> None:
+        self._last_update = time.time()
+
+
+@contextlib.contextmanager
+def open_spinner(message: str) -> Generator[SpinnerInterface, None, None]:
+    # Interactive spinner goes directly to sys.stdout rather than being routed
+    # through the logging system, but it acts like it has level INFO,
+    # i.e. it's only displayed if we're at level INFO or better.
+    # Non-interactive spinner goes through the logging system, so it is always
+    # in sync with logging configuration.
+    if sys.stdout.isatty() and logger.getEffectiveLevel() <= logging.INFO:
+        spinner: SpinnerInterface = InteractiveSpinner(message)
+    else:
+        spinner = NonInteractiveSpinner(message)
+    try:
+        with hidden_cursor(sys.stdout):
+            yield spinner
+    except KeyboardInterrupt:
+        spinner.finish("canceled")
+        raise
+    except Exception:
+        spinner.finish("error")
+        raise
+    else:
+        spinner.finish("done")
+
+
+HIDE_CURSOR = "\x1b[?25l"
+SHOW_CURSOR = "\x1b[?25h"
+
+
+@contextlib.contextmanager
+def hidden_cursor(file: IO[str]) -> Generator[None, None, None]:
+    # The Windows terminal does not support the hide/show cursor ANSI codes,
+    # even via colorama. So don't even try.
+    if WINDOWS:
+        yield
+    # We don't want to clutter the output with control characters if we're
+    # writing to a file, or if the user is running with --quiet.
+    # See https://github.com/pypa/pip/issues/3418
+    elif not file.isatty() or logger.getEffectiveLevel() > logging.INFO:
+        yield
+    else:
+        file.write(HIDE_CURSOR)
+        try:
+            yield
+        finally:
+            file.write(SHOW_CURSOR)

venv/lib/python3.11/site-packages/pip/_internal/cli/status_codes.py

@@ -0,0 +1,6 @@
+SUCCESS = 0
+ERROR = 1
+UNKNOWN_ERROR = 2
+VIRTUALENV_NOT_FOUND = 3
+PREVIOUS_BUILD_DIR_ERROR = 4
+NO_MATCHES_FOUND = 23

venv/lib/python3.11/site-packages/pip/_internal/commands/__init__.py

@@ -0,0 +1,132 @@
+"""
+Package containing all pip commands
+"""
+
+import importlib
+from collections import namedtuple
+from typing import Any, Dict, Optional
+
+from pip._internal.cli.base_command import Command
+
+CommandInfo = namedtuple("CommandInfo", "module_path, class_name, summary")
+
+# This dictionary does a bunch of heavy lifting for help output:
+# - Enables avoiding additional (costly) imports for presenting `--help`.
+# - The ordering matters for help display.
+#
+# Even though the module path starts with the same "pip._internal.commands"
+# prefix, the full path makes testing easier (specifically when modifying
+# `commands_dict` in test setup / teardown).
+commands_dict: Dict[str, CommandInfo] = {
+    "install": CommandInfo(
+        "pip._internal.commands.install",
+        "InstallCommand",
+        "Install packages.",
+    ),
+    "download": CommandInfo(
+        "pip._internal.commands.download",
+        "DownloadCommand",
+        "Download packages.",
+    ),
+    "uninstall": CommandInfo(
+        "pip._internal.commands.uninstall",
+        "UninstallCommand",
+        "Uninstall packages.",
+    ),
+    "freeze": CommandInfo(
+        "pip._internal.commands.freeze",
+        "FreezeCommand",
+        "Output installed packages in requirements format.",
+    ),
+    "inspect": CommandInfo(
+        "pip._internal.commands.inspect",
+        "InspectCommand",
+        "Inspect the python environment.",
+    ),
+    "list": CommandInfo(
+        "pip._internal.commands.list",
+        "ListCommand",
+        "List installed packages.",
+    ),
+    "show": CommandInfo(
+        "pip._internal.commands.show",
+        "ShowCommand",
+        "Show information about installed packages.",
+    ),
+    "check": CommandInfo(
+        "pip._internal.commands.check",
+        "CheckCommand",
+        "Verify installed packages have compatible dependencies.",
+    ),
+    "config": CommandInfo(
+        "pip._internal.commands.configuration",
+        "ConfigurationCommand",
+        "Manage local and global configuration.",
+    ),
+    "search": CommandInfo(
+        "pip._internal.commands.search",
+        "SearchCommand",
+        "Search PyPI for packages.",
+    ),
+    "cache": CommandInfo(
+        "pip._internal.commands.cache",
+        "CacheCommand",
+        "Inspect and manage pip's wheel cache.",
+    ),
+    "index": CommandInfo(
+        "pip._internal.commands.index",
+        "IndexCommand",
+        "Inspect information available from package indexes.",
+    ),
+    "wheel": CommandInfo(
+        "pip._internal.commands.wheel",
+        "WheelCommand",
+        "Build wheels from your requirements.",
+    ),
+    "hash": CommandInfo(
+        "pip._internal.commands.hash",
+        "HashCommand",
+        "Compute hashes of package archives.",
+    ),
+    "completion": CommandInfo(
+        "pip._internal.commands.completion",
+        "CompletionCommand",
+        "A helper command used for command completion.",
+    ),
+    "debug": CommandInfo(
+        "pip._internal.commands.debug",
+        "DebugCommand",
+        "Show information useful for debugging.",
+    ),
+    "help": CommandInfo(
+        "pip._internal.commands.help",
+        "HelpCommand",
+        "Show help for commands.",
+    ),
+}
+
+
+def create_command(name: str, **kwargs: Any) -> Command:
+    """
+    Create an instance of the Command class with the given name.
+    """
+    module_path, class_name, summary = commands_dict[name]
+    module = importlib.import_module(module_path)
+    command_class = getattr(module, class_name)
+    command = command_class(name=name, summary=summary, **kwargs)
+
+    return command
+
+
+def get_similar_commands(name: str) -> Optional[str]:
+    """Command name auto-correct."""
+    from difflib import get_close_matches
+
+    name = name.lower()
+
+    close_commands = get_close_matches(name, commands_dict.keys())
+
+    if close_commands:
+        return close_commands[0]
+    else:
+        return None