Make typing-extensions optional again (#2409)

Kludex · web-flow · commit 6c4ffeee01af · 2024-01-11T12:55:30.000-07:00
diff --git a/starlette/applications.py b/starlette/applications.py
@@ -1,9 +1,13 @@
 from __future__ import annotations
 
+import sys
 import typing
 import warnings
 
-from typing_extensions import ParamSpec
+if sys.version_info >= (3, 10):  # pragma: no cover
+    from typing import ParamSpec
+else:  # pragma: no cover
+    from typing_extensions import ParamSpec
 
 from starlette.datastructures import State, URLPath
 from starlette.middleware import Middleware, _MiddlewareClass
diff --git a/starlette/middleware/__init__.py b/starlette/middleware/__init__.py
@@ -1,6 +1,10 @@
+import sys
 from typing import Any, Iterator, Protocol, Type
 
-from typing_extensions import ParamSpec
+if sys.version_info >= (3, 10):  # pragma: no cover
+    from typing import ParamSpec
+else:  # pragma: no cover
+    from typing_extensions import ParamSpec
 
 from starlette.types import ASGIApp, Receive, Scope, Send
 
