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Avoid importing typing extensions unless type checking #571

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Merged
jelmer merged 1 commit into from
Feb 19, 2026
+7 −6
Merged

Avoid importing typing extensions unless type checking #571

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1 change: 1 addition & 0 deletions pyproject.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,7 @@ twisted = ["Twisted", "fixtures"]
dev = [
"ruff==0.14.11",
"mypy>=1.0.0",
"typing-extensions;python_version<'3.11'",
]

[tool.hatch.version]
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1 change: 0 additions & 1 deletion requirements.txt
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@@ -1,2 +1 @@
fixtures>=2.0
typing-extensions;python_version<'3.11'
11 changes: 6 additions & 5 deletions testtools/matchers/_higherorder.py
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Expand Up @@ -13,12 +13,13 @@
import sys
import types
from collections.abc import Callable, Iterable
from typing import Any, Generic, TypedDict, TypeVar
from typing import TYPE_CHECKING, Any, Generic, TypedDict, TypeVar

if sys.version_info >= (3, 11):
from typing import Unpack
else:
from typing_extensions import Unpack
if TYPE_CHECKING:
if sys.version_info >= (3, 11):
from typing import Unpack
else:
from typing_extensions import Unpack

from ._impl import (
Matcher,
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