Add mypy support

mypy.ini

@@ -0,0 +1,16 @@
+[mypy]
+
+check_untyped_defs = True
+disallow_incomplete_defs = True
+disallow_untyped_defs = True
+disallow_any_generics = True
+disallow_untyped_calls = True
+disallow_untyped_decorators = True
+disallow_subclassing_any = True
+ignore_missing_imports = True
+strict_optional = True
+strict_equality = True
+warn_redundant_casts = True
+warn_return_any = True
+warn_unused_configs = True
+warn_unused_ignores = True

setup.py

@@ -14,6 +14,7 @@ extras_require = {
     'lint': [
         "flake8==3.4.1",
         "isort>=4.2.15,<5",
+        "mypy==0.701",
         "pydocstyle>=3.0.0,<4",
     ],
     'doc': [

tox.ini

@@ -38,6 +38,7 @@ whitelist_externals=make
 basepython=python
 extras=lint
 commands=
+    mypy -p {toxinidir}/<MODULE_NAME> --config-file {toxinidir}/mypy.ini
     flake8 {toxinidir}/<MODULE_NAME> {toxinidir}/tests
     isort --recursive --check-only --diff {toxinidir}/<MODULE_NAME> {toxinidir}/tests
     pydocstyle {toxinidir}/<MODULE_NAME> {toxinidir}/tests