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__getitem__ iterable support for builtins, collections, itertools #8597

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__getitem__ iterable support for builtins, collections, itertools #8597

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e1d57a0
Introduce `IterableOrSupportsIntGetItem` protocol
mixilchenko Aug 23, 2022
7b4b38c
Support `builtins` iteration with `__getitem__`
mixilchenko Aug 23, 2022
37dc024
Support `itertools` iteration with `__getitem__`
mixilchenko Aug 23, 2022
f923643
Support `collections` iteration with `__getitem__`
mixilchenko Aug 23, 2022
0e5af3f
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Aug 23, 2022
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8 changes: 6 additions & 2 deletions stdlib/_typeshed/__init__.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -99,10 +99,12 @@ class SupportsIter(Protocol[_T_co]):
class SupportsAiter(Protocol[_T_co]):
def __aiter__(self) -> _T_co: ...

class SupportsLenAndGetItem(Protocol[_T_co]):
def __len__(self) -> int: ...
class SupportsIntGetItem(Protocol[_T_co]):
def __getitem__(self, __k: int) -> _T_co: ...

class SupportsLenAndGetItem(SupportsIntGetItem[_T_co]):
def __len__(self) -> int: ...

class SupportsTrunc(Protocol):
def __trunc__(self) -> int: ...

Expand Down Expand Up @@ -276,3 +278,5 @@ ProfileFunction: TypeAlias = Callable[[FrameType, str, Any], object]
# Objects suitable to be passed to sys.settrace, threading.settrace, and similar
# TODO: Ideally this would be a recursive type alias
TraceFunction: TypeAlias = Callable[[FrameType, str, Any], Callable[[FrameType, str, Any], Any] | None]

IterableOrSupportsIntGetItem: TypeAlias = Iterable[_T] | SupportsIntGetItem[_T]
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