Added python version check for typing_Extensions

Author: semohr

beets/metadata_plugins.py

@@ -9,15 +9,19 @@
 
 import abc
 import re
+import sys
 from typing import TYPE_CHECKING, Generic, Literal, Sequence, TypedDict, TypeVar
 
-from typing_extensions import NotRequired
-
 from beets.util import cached_classproperty
 from beets.util.id_extractors import extract_release_id
 
 from .plugins import BeetsPlugin, find_plugins, notify_info_yielded, send
 
+if sys.version_info >= (3, 11):
+    from typing import NotRequired
+else:
+    from typing_extensions import NotRequired
+
 if TYPE_CHECKING:
     from collections.abc import Iterable