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Annotate encoding argument and return type of io.text_encoding as TypeVar with upper bound str in second overload #15663

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Merged
srittau merged 1 commit into from
Apr 22, 2026
+2 −2
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Annotate encoding argument and return type of io.text_encoding as TypeVar with upper bound str in second overload #15663

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4 changes: 2 additions & 2 deletions stdlib/_io.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ from types import TracebackType
from typing import IO, Any, BinaryIO, Final, Generic, Literal, Protocol, TextIO, TypeVar, overload, type_check_only
from typing_extensions import Self, disjoint_base

_T = TypeVar("_T")
_S = TypeVar("_S", bound=str)

if sys.version_info >= (3, 14):
DEFAULT_BUFFER_SIZE: Final = 131072
Expand Down Expand Up @@ -298,4 +298,4 @@ if sys.version_info >= (3, 10):
@overload
def text_encoding(encoding: None, stacklevel: int = 2, /) -> Literal["locale", "utf-8"]: ...
@overload
def text_encoding(encoding: _T, stacklevel: int = 2, /) -> _T: ...
def text_encoding(encoding: _S, stacklevel: int = 2, /) -> _S: ...