added merge pdfs, fixed jpgstopdf arg issues,

exceltocsv.py

@@ -1,17 +1,47 @@
 import pandas as pd
 import sys
+import os
 
-if len(sys.argv) != 3:
-    print("Usage: python excel_to_csv.py <input_excel_path> <output_csv_path>")
-    sys.exit(1)
+def main():
+    if len(sys.argv) != 3:
+        print("Usage: python excelto_csv.py <input_excel_path> <output_csv_path>")
+        sys.exit(1)
 
-input_excel_path = sys.argv[1]
-output_csv_path = sys.argv[2]
+    input_excel_path = sys.argv[1]
+    output_csv_path = sys.argv[2]
 
-try:
-    df = pd.read_excel(input_excel_path)
-    df.to_csv(output_csv_path, index=False)
-    print(f"Conversion complete. Check the {output_csv_path} file.")
-except Exception as e:
-    print(f"Error during conversion: {e}")
-    sys.exit(1)
+    # Check if input Excel file exists
+    if not os.path.isfile(input_excel_path):
+        print(f"Error: The input Excel file '{input_excel_path}' does not exist.")
+        sys.exit(1)
+
+    # Check if the output directory is writable
+    output_dir = os.path.dirname(output_csv_path)
+    if output_dir and not os.access(output_dir, os.W_OK):
+        print(f"Error: The output directory '{output_dir}' is not writable.")
+        sys.exit(1)
+
+    try:
+        # Read the Excel file
+        df = pd.read_excel(input_excel_path, engine='openpyxl')
+        # Convert to CSV
+        df.to_csv(output_csv_path, index=False)
+        print(f"Conversion complete. Check the '{output_csv_path}' file.")
+    except FileNotFoundError:
+        print(f"Error: The input Excel file '{input_excel_path}' was not found.")
+        sys.exit(1)
+    except pd.errors.EmptyDataError:
+        print(f"Error: The input Excel file '{input_excel_path}' is empty.")
+        sys.exit(1)
+    except pd.errors.ExcelFileError as e:
+        print(f"Error reading the Excel file '{input_excel_path}': {e}")
+        sys.exit(1)
+    except PermissionError:
+        print(f"Error: Permission denied when writing to '{output_csv_path}'.")
+        sys.exit(1)
+    except Exception as e:
+        print(f"An unexpected error occurred during conversion: {e}")
+        sys.exit(1)
+
+if __name__ == "__main__":
+    main()