Require typing_extensions on Python < 3.13 (#193)

On newer Python releases, the typing module has all we need.

Fixes: #189

Author: semohr

confuse/core.py

@@ -30,11 +30,16 @@
 
 import errno
 import os
+import sys
 from collections import OrderedDict
 from typing import TYPE_CHECKING, Any, TypeVar, overload
 
+if sys.version_info < (3, 11):
+    from typing_extensions import Self
+else:
+    from typing import Self
+
 import yaml
-from typing_extensions import Self
 
 from . import templates, util, yaml_util
 from .exceptions import ConfigError, ConfigTypeError, NotFoundError

confuse/templates.py

@@ -4,12 +4,16 @@
 import os
 import pathlib
 import re
+import sys
 from collections import abc
 from collections.abc import Hashable, Iterable, Mapping
 from functools import singledispatchmethod
 from typing import TYPE_CHECKING, Any, Generic, NoReturn, overload
 
-from typing_extensions import TypeVar
+if sys.version_info < (3, 13):
+    from typing_extensions import TypeVar
+else:
+    from typing import TypeVar
 
 from . import exceptions, util
 

docs/changelog.rst

@@ -1,6 +1,12 @@
 Changelog
 =========
 
+Unreleased
+----------
+
+- Require `typing_extensions` on older Python versions (and use `typing` on
+  newer versions). [#189](https://github.com/beetbox/confuse/issues/189)
+
 v2.2.0
 ------
 

poetry.lock

@@ -18,6 +18,7 @@ classifiers = [
 ]
 dependencies = [
     "pyyaml",
+    "typing_extensions >= 4.4; python_version < '3.13'",
 ]
 
 [dependency-groups]