Trying to fix flake8

.github/workflows/lint.yml

@@ -19,13 +19,25 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: '3.x'
+          python-version: '3.12'  # Specify the exact Python version
+
+      - name: Cache pip dependencies
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
 
       - name: Install dependencies
         run: |
           python -m venv venv  # Create a virtual environment in the project root
-          ./venv/bin/pip install -r requirements.txt  # Install dependencies from requirements.txt
+          source venv/bin/activate
+          pip install --upgrade pip
+          pip install -r requirements.txt  # Install dependencies from requirements.txt
 
       - name: Run Flake8
         run: |
-          ./venv/bin/flake8 . --config=.flake8  # Run flake8 using the configuration in .flake8
+          source venv/bin/activate
+          flake8 . --config=.flake8  # Run flake8 using the configuration in .flake8
+