Add py.typed marker and stub for decorator type

memoize/wrapper.pyi

@@ -0,0 +1,17 @@
+from typing import Callable, TypeVar, overload, Optional
+
+from memoize.configuration import CacheConfiguration
+from memoize.invalidation import InvalidationSupport
+from memoize.statuses import UpdateStatuses
+
+FN = TypeVar('FN', bound=Callable)
+
+
+@overload
+def memoize(*, configuration: Optional[CacheConfiguration] = None,
+            invalidation: Optional[InvalidationSupport] = None, update_statuses: Optional[UpdateStatuses] = None) -> Callable[[FN], FN]: ...
+
+
+@overload
+def memoize(method: FN, configuration: Optional[CacheConfiguration] = None,
+            invalidation: Optional[InvalidationSupport] = None, update_statuses: Optional[UpdateStatuses] = None) -> FN: ...

setup.py

@@ -17,6 +17,7 @@ def prepare_description():
     url='https://github.com/DreamLab/memoize',
     maintainer='DreamLab',
     packages=['memoize'],
+    package_data={'memoize': ['py.typed']},
     test_suite='tests',
     license='Apache License 2.0',
     description=('Caching library for asynchronous Python applications (both based on asyncio and Tornado) '