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Add metaclasses for string.Template and dataclasses.InitVar #8852

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Merged
merged 3 commits into from
Oct 5, 2022
Merged

Add metaclasses for string.Template and dataclasses.InitVar #8852

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b6122f0
Add metaclasses for `string.Template` and `dataclasses.InitVar`
sobolevn Oct 5, 2022
a31fc48
Update dataclasses.pyi
sobolevn Oct 5, 2022
f3f3f3b
Update dataclasses.pyi
sobolevn Oct 5, 2022
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11 changes: 9 additions & 2 deletions stdlib/dataclasses.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@ import types
from builtins import type as Type # alias to avoid name clashes with fields named "type"
from collections.abc import Callable, Iterable, Mapping
from typing import Any, Generic, Protocol, TypeVar, overload
from typing_extensions import Literal
from typing_extensions import Literal, TypeAlias

if sys.version_info >= (3, 9):
from types import GenericAlias
Expand Down Expand Up @@ -217,7 +217,14 @@ def is_dataclass(obj: Any) -> bool: ...

class FrozenInstanceError(AttributeError): ...

class InitVar(Generic[_T]):
if sys.version_info >= (3, 9):
_InitVarMeta: TypeAlias = type
else:
class _InitVarMeta(type):
# Not used, instead `InitVar.__class_getitem__` is called.
def __getitem__(self, params: Any) -> InitVar[Any]: ...

class InitVar(Generic[_T], metaclass=_InitVarMeta):
type: Type[_T]
def __init__(self, type: Type[_T]) -> None: ...
if sys.version_info >= (3, 9):
Expand Down
11 changes: 9 additions & 2 deletions stdlib/string.pyi
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Expand Up @@ -3,7 +3,7 @@ from _typeshed import StrOrLiteralStr
from collections.abc import Iterable, Mapping, Sequence
from re import Pattern, RegexFlag
from typing import Any, ClassVar, overload
from typing_extensions import LiteralString
from typing_extensions import LiteralString, TypeAlias

__all__ = [
"ascii_letters",
Expand Down Expand Up @@ -32,7 +32,14 @@ whitespace: LiteralString

def capwords(s: StrOrLiteralStr, sep: StrOrLiteralStr | None = ...) -> StrOrLiteralStr: ...

class Template:
if sys.version_info >= (3, 9):
_TemplateMetaclass: TypeAlias = type
else:
class _TemplateMetaclass(type):
pattern: ClassVar[str]
def __init__(cls, name: str, bases: tuple[type, ...], dct: dict[str, Any]) -> None: ...

class Template(metaclass=_TemplateMetaclass):
template: str
delimiter: ClassVar[str]
idpattern: ClassVar[str]
Expand Down