mypy

Author: bmartinn

src/pip/_internal/req/__init__.py

@@ -86,10 +86,10 @@ def install_given_reqs(
 
 
 def __safe_pool_map(
-        func,               # type: Callable
+        func,               # type: Callable[[Any], Any]
         iterable,           # type: Iterable[Any]
 ):
-    # type: (...) -> Optional[List[None, InstallationResult, BaseException]]
+    # type: (...) -> Optional[List[Any]]
     """
     Safe call to Pool map, if Pool is not available return None