Fix CI: lint only Python files, guard against null bytes

Author: shubhmrj

.github/workflows/python-package.yml

@@ -1,6 +1,3 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
-
 name: Python package
 
 on:
@@ -20,21 +17,32 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v3
       with:
         python-version: ${{ matrix.python-version }}
+
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         python -m pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+
     - name: Lint with flake8
       run: |
-        # stop the build if there are Python syntax errors or undefined names
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        echo "🔍 Checking for null bytes in Python files..."
+        if grep -rl $'\x00' --include="*.py" .; then
+          echo "❌ Found null bytes in Python source files!"
+          exit 1
+        fi
+
+        echo "✅ Running flake8 only on Python files..."
+        # Stop the build on syntax errors/undefined names
+        flake8 --count --select=E9,F63,F7,F82 --show-source --statistics
+        # Style checks (won't fail build)
+        flake8 --count --exit-zero --max-complexity=10 --max-line-length=100 --statistics
+
     - name: Test with pytest
       run: |
         pytest