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Issue #29198: add AsyncGenerator (Jelle Zijlstra)

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This commit is contained in:
Guido van Rossum 2017-01-18 13:10:31 -08:00
parent 3c268be885
commit e9ed560fce
2 changed files with 51 additions and 1 deletions
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10
Lib/typing.py
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@ -51,7 +51,8 @@ __all__ = [
# AsyncIterable,
# Coroutine,
# Collection,
# ContextManager
# ContextManager,
# AsyncGenerator,
# Structural checks, a.k.a. protocols.
'Reversible',
@ -1900,6 +1901,13 @@ class Generator(Iterator[T_co], Generic[T_co, T_contra, V_co],
"create a subclass instead")
return _generic_new(_G_base, cls, *args, **kwds)
if hasattr(collections_abc, 'AsyncGenerator'):
class AsyncGenerator(AsyncIterator[T_co], Generic[T_co, T_contra],
extra=collections_abc.AsyncGenerator):
__slots__ = ()
__all__.append('AsyncGenerator')
# Internal type variable used for Type[].
CT_co = TypeVar('CT_co', covariant=True, bound=type)