Action that finds Python 3 syntax errors and undefined names

A GitHub Action that runs selected flake8 tests on the Python code in your repo. If there are syntax errors or undefined names found in your Python code then this Action will fail.

Example workflow (Put the following text into .github/workflows/main.yml):

on: push
name: Lint Python
jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: cclauss/Find-Python-syntax-errors-action@master

Flake8 finds Python 3 syntax errors and undefined names

$ flake8 . --count --select=E9,F63,F72,F82 --show-source --statistics

E901,E999,F821,F822,F823 are the "showstopper" flake8 issues that can halt the runtime with a SyntaxError, NameError, etc. These 5 are different from most other flake8 issues which are merely "style violations" -- useful for readability but they do not effect runtime safety.

• F821: undefined name name
• F822: undefined name name in __all__
• F823: local variable name referenced before assignment
• E901: SyntaxError or IndentationError
• E999: SyntaxError -- failed to compile a file into an Abstract Syntax Tree

For more tests and more control, instead of using this action,

You can add the file .github/workflows/lint_python.yml to your repo...

name: lint_python
on: [pull_request, push]
jobs:
  lint_python:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v3
      - run: pip install bandit black codespell flake8 isort mypy pytest pyupgrade safety
      - run: bandit --recursive --skip B101 . || true  # B101 is assert statements
      - run: black --check . || true
      - run: codespell || true  # --ignore-words-list="" --skip=""
      - run: flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
      - run: flake8 . --count --exit-zero --max-complexity=10 --max-line-length=88 --show-source --statistics
      - run: isort --check-only --profile black . || true
      - run: pip install -r requirements.txt || true
      - run: mypy --install-types --non-interactive . || true
      - run: pytest . || true
      - run: pytest --doctest-modules . || true
      - run: shopt -s globstar && pyupgrade --py36-plus **/*.py || true
      - run: safety check