Fix issue #398 with FastAPI request importing

Author: rmk135

docs/main/changelog.rst

@@ -7,6 +7,12 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+Development version
+-------------------
+- Hotfix a bug with importing FastAPI ``Request``.
+  See issue: `#398 <https://github.com/ets-labs/python-dependency-injector/issues/398>`_.
+  Thanks to `@tapm <https://github.com/tapm>`_ for reporting the bug.
+
 4.23.0
 ------
 - Add support of aliases for ``Configuration`` provider.

src/dependency_injector/wiring.py

@@ -345,8 +345,13 @@ def _unpatch(
 def _fetch_reference_injections(
         fn: Callable[..., Any],
 ) -> Tuple[Dict[str, Any], Dict[str, Any]]:
-    # # Hotfix, see: https://github.com/ets-labs/python-dependency-injector/issues/362
-    if GenericAlias and fn is GenericAlias:
+    # Hotfix, see:
+    # - https://github.com/ets-labs/python-dependency-injector/issues/362
+    # - https://github.com/ets-labs/python-dependency-injector/issues/398
+    if GenericAlias and any((
+                fn is GenericAlias,
+                getattr(fn, '__func__', None) is GenericAlias
+            )):
         fn = fn.__init__
 
     signature = inspect.signature(fn)

tests/unit/samples/wiringfastapi/web.py

@@ -1,6 +1,7 @@
 import sys
 
 from fastapi import FastAPI, Depends
+from fastapi import Request  # See: https://github.com/ets-labs/python-dependency-injector/issues/398
 from fastapi.security import HTTPBasic, HTTPBasicCredentials
 from dependency_injector import containers, providers
 from dependency_injector.wiring import inject, Provide