Issue #29198: add AsyncGenerator (Jelle Zijlstra) (3.6->3.7)

1 files changed, 9 insertions, 1 deletions

diff --git a/Lib/typing.py b/Lib/typing.py
index 0aeb089d5d..00ef440101 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -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)