Check type hints with mypy

.github/workflows/tests.yml

@@ -34,6 +34,20 @@ jobs:
           PYVERSION=$(python -c "import sys; print(''.join([str(sys.version_info.major), str(sys.version_info.minor)]))")
           python -m tox -f $(python -m tox --listenvs | grep "^py${PYVERSION}" | tr '\n' ',')
 
+  mypy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.6
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip tox
+      - name: Run mypy
+        run: python -m tox -e mypy
+
   lint:
     runs-on: ubuntu-latest
     steps:

.gitignore

@@ -1,4 +1,5 @@
 *.py[cod]
+.mypy_cache
 
 # C extensions
 *.so

MANIFEST.in

@@ -7,4 +7,5 @@ recursive-include examples *.py
 recursive-include tests *.py
 
 exclude Makefile
+exclude mypy.ini
 recursive-exclude scrape *

Makefile

@@ -8,3 +8,4 @@ test:
 	python -m tox -e package
 	python -m tox --listenvs | grep "^py${PYVERSION}" | tr "\n" "," | xargs python -m tox -e
 	black --check ${PYDIRS}
+	mypy awacs

mypy.ini

@@ -0,0 +1,11 @@
+[mypy]
+check_untyped_defs = True
+disallow_untyped_calls = True
+disallow_untyped_defs = True
+follow_imports = silent
+ignore_missing_imports = True
+python_version = 3.6
+strict_optional = True
+warn_redundant_casts = True
+warn_unused_ignores = True
+show_error_codes = True

tox.ini

@@ -6,6 +6,12 @@ envlist =
 [testenv]
 commands = python -W error::DeprecationWarning -W error::PendingDeprecationWarning setup.py test {posargs}
 
+[testenv:mypy]
+deps =
+    mypy
+commands =
+    mypy awacs
+
 [testenv:qa]
 deps =
     pycodestyle