Nov 5, 2020 · May 29, 2020 · May 29, 2020 · May 29, 2020 · Jul 20, 2020 · Jul 20, 2020
diff --git a/Doc/library/contextlib.rst b/Doc/library/contextlib.rst

   .. versionadded:: 3.7

   :func:`asynccontextmanager` uses :class:`AsyncContextDecorator` so the context managers
   it creates can be used as decorators as well as in :keyword:`async with` statements.
   Context managers defined with :func:`asynccontextmanager` can be used
   either as decorators or with :keyword:`async with` statements::

     import time

     async def timeit():
         now = time.monotonic()
         try:
             yield
         finally:
             print(f'it took {time.monotonic() - now}s to run')

      @timeit()
      async def main():
          # ... async code ...

   When used as a decorator, a new generator instance is implicitly created on
   each function call (this allows the otherwise "one-shot" context managers
   each function call. This allows the otherwise "one-shot" context managers
   created by :func:`asynccontextmanager` to meet the requirement that context
   managers support multiple invocations in order to be used as decorators).
   managers support multiple invocations in order to be used as decorators.

  .. versionchanged:: 3.10
  Use of :class:`AsyncContextDecorator`.
     Async context managers created with :func:`asynccontextmanager` can
     be used as decorators.


 .. function:: closing(thing)
Original file line number	Diff line number	Diff line change
Expand Up		@@ -126,15 +126,30 @@ Functions and classes provided:

		.. versionadded:: 3.7

		:func:`asynccontextmanager` uses :class:`AsyncContextDecorator` so the context managers
		it creates can be used as decorators as well as in :keyword:`async with` statements.
		Context managers defined with :func:`asynccontextmanager` can be used
		either as decorators or with :keyword:`async with` statements::

		import time

		async def timeit():
		now = time.monotonic()
		try:
		yield
		finally:
		print(f'it took {time.monotonic() - now}s to run')

		@timeit()
		async def main():
		# ... async code ...

		When used as a decorator, a new generator instance is implicitly created on
		each function call (this allows the otherwise "one-shot" context managers
		each function call. This allows the otherwise "one-shot" context managers
		created by :func:`asynccontextmanager` to meet the requirement that context
		managers support multiple invocations in order to be used as decorators).
		managers support multiple invocations in order to be used as decorators.

		.. versionchanged:: 3.10
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		Use of :class:`AsyncContextDecorator`.
		Async context managers created with :func:`asynccontextmanager` can
		be used as decorators.


		.. function:: closing(thing)
Expand Down