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add typing.AsyncContextManager and contextlib.asynccontextmanager #1432

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Merged
merged 1 commit into from
Jun 27, 2017
Merged

add typing.AsyncContextManager and contextlib.asynccontextmanager #1432

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6 changes: 6 additions & 0 deletions stdlib/2and3/contextlib.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,9 @@ import sys
# Aliased here for backwards compatibility; TODO eventually remove this
from typing import ContextManager as ContextManager

if sys.version_info >= (3, 5):
from typing import AsyncContextManager, AsyncIterator

if sys.version_info >= (3, 6):
from typing import ContextManager as AbstractContextManager

Expand All @@ -26,6 +29,9 @@ if sys.version_info >= (3, 2):
else:
def contextmanager(func: Callable[..., Iterator[_T]]) -> Callable[..., ContextManager[_T]]: ...

if sys.version_info >= (3, 7):
def asynccontextmanager(func: Callable[..., AsyncIterator[_T]]) -> Callable[..., AsyncContextManager[_T]]: ...

if sys.version_info < (3,):
def nested(*mgr: ContextManager[Any]) -> ContextManager[Iterable[Any]]: ...

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7 changes: 7 additions & 0 deletions stdlib/3/typing.pyi
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Expand Up @@ -291,6 +291,13 @@ class ContextManager(Generic[_T_co]):
exc_value: Optional[BaseException],
traceback: Optional[TracebackType]) -> Optional[bool]: ...

if sys.version_info >= (3, 5):
class AsyncContextManager(Generic[_T_co]):
def __aenter__(self) -> Awaitable[_T_co]: ...
def __aexit__(self, exc_type: Optional[Type[BaseException]],
exc_value: Optional[BaseException],
traceback: Optional[TracebackType]) -> Awaitable[Optional[bool]]: ...

class Mapping(_Collection[_KT], Generic[_KT, _VT_co]):
# TODO: We wish the key type could also be covariant, but that doesn't work,
# see discussion in https: //github.com/python/typing/pull/273.
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