Static typing: beyond the basics of def foo(x: int) -str:

# Ensure full coverage
disallow_untyped_calls = True
disallow_untyped_defs = True
disallow_incomplete_defs = True
disallow_untyped_decorators = True

# Restrict dynamic typing
disallow_any_generics = True
disallow_subclassing_any = True
warn_return_any = True

# Know exactly what you're doing
warn_redundant_casts = True
warn_unused_ignores = True
warn_unused_configs = True

# imports
ignore_missing_imports = True
follow_imports = silent  # do not use 'follow_import = skip'

[mypy-*.tests.*]
disallow_untyped_decorators = False  # pytest decorators are untyped.
disallow_untyped_defs = False      # Properly typing *all* fixtures
disallow_incomplete_defs = False   # and tests is hard and noisy.

setup(
  ...,
  package_data = {
    'your_package': ['py.typed'],
  },
  ...,
)

[mypy-"package.to.ignore"]
ignore_missing_imports = True
follow_imports = silent