PEP 561 compatibility: Expose type information (#116)

* Add PEP-561 support

* Fix mypy with up-to-date marshmallow

* Update changelog

CHANGELOG.md

@@ -3,7 +3,9 @@
 ## (unreleased)
 
 - Improve typings and run mypy with dependencies type annotations ([#115](https://github.com/sloria/environs/pull/115)).
-  Thanks [hukkinj1](https://github.com/hukkinj1).
+- Distribute types per PEP 561 ([#116](https://github.com/sloria/environs/pull/116)).
+
+Thanks [hukkinj1](https://github.com/hukkinj1) for the PRs..
 
 ## 7.0.0 (2019-12-02)
 

environs.py → environs/__init__.py

@@ -195,10 +195,7 @@ def _deserialize(self, value, *args, **kwargs) -> Path:
 
 
 class LogLevelField(ma.fields.Int):
-    # Type ignore, because the return type annotation of the super
-    # class is a private TypeVar incompatible with int. The annotation
-    # in super should probably be Any.
-    def _format_num(self, value) -> int:  # type: ignore
+    def _format_num(self, value) -> int:
         try:
             return super()._format_num(value)
         except (TypeError, ValueError) as error:

environs/py.typed

@@ -0,0 +1 @@
+# Marker file for PEP 561.

setup.py

@@ -34,8 +34,9 @@ def read(fname):
 
 setup(
     name="environs",
-    py_modules=["environs"],
-    version=find_version("environs.py"),
+    packages=["environs"],
+    package_data={"environs": ["py.typed"]},
+    version=find_version("environs/__init__.py"),
     description="simplified environment variable parsing",
     long_description=read("README.md"),
     long_description_content_type="text/markdown",
@@ -57,6 +58,7 @@ def read(fname):
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Typing :: Typed",
     ],
     project_urls={
         "Issues": "https://github.com/sloria/environs/issues",