GitHub Action to lint Python code

.github/workflows/lint_python.yml

@@ -0,0 +1,17 @@
+name: lint_python
+on: [pull_request, push]
+jobs:
+  lint_python:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+      - run: pip install black codespell flake8 isort pytest pyupgrade
+      - run: black --check . || true
+      - run: codespell --quiet-level=2  # --ignore-words-list="" --skip=""
+      - run: flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+      - run: isort --profile black . || true
+      - run: pip install -r requirements.txt || true
+      - run: pip install Flask Flask-SQLAlchemy psutil redis
+      - run: pytest .
+      - run: shopt -s globstar && pyupgrade --py36-plus **/*.py || true

tests/__init__.py

@@ -0,0 +1 @@
+

tests/test_utils.py

@@ -72,7 +72,8 @@ def test_file_lock():
     try:
         lock_copy.acquire()
     except BlockingIOError as e:
-        assert e.__str__() == "[Errno 35] Resource temporarily unavailable"
+        errno = 11 if os.getenv("GITHUB_ACTIONS") else 35
+        assert str(e) == f"[Errno {errno}] Resource temporarily unavailable"
 
     lock.release()
     assert not lock_copy.acquire()