Use typing_extensions.Self as fallback (fixes #902)

Author: ZipFile

src/dependency_injector/containers.pyi

@@ -17,7 +17,10 @@ from typing import (
     overload,
 )
 
-from typing_extensions import Self as _Self
+try:
+    from typing import Self as _Self
+except ImportError:
+    from typing_extensions import Self as _Self
 
 from .providers import Provider, ProviderParent, Self
 

src/dependency_injector/wiring.py

@@ -25,7 +25,10 @@
     cast,
 )
 
-from typing_extensions import Self
+try:
+    from typing import Self
+except ImportError:
+    from typing_extensions import Self
 
 try:
     from functools import cache