diff options
| author | Tom Gringauz <tomgrin10@gmail.com> | 2020-11-09 12:34:07 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-11-09 12:34:07 (GMT) |
| commit | a117167d8dc8fa673a4646f509551c7950f824e5 (patch) | |
| tree | 14ed56dc05c33931932c8e911a76b374d9fd74b1 /Doc/library | |
| parent | 97e8b1eaeaf3aa325c84ff2e13417c30414d0269 (diff) | |
| download | cpython-a117167d8dc8fa673a4646f509551c7950f824e5.zip cpython-a117167d8dc8fa673a4646f509551c7950f824e5.tar.gz cpython-a117167d8dc8fa673a4646f509551c7950f824e5.tar.bz2 | |
bpo-41543: contextlib.nullcontext can fill in for an async context manager (GH-21870)
Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>
Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/contextlib.rst | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Doc/library/contextlib.rst b/Doc/library/contextlib.rst index d5a1068..91edbba 100644 --- a/Doc/library/contextlib.rst +++ b/Doc/library/contextlib.rst @@ -243,8 +243,26 @@ Functions and classes provided: with cm as file: # Perform processing on the file + It can also be used as a stand-in for + :ref:`asynchronous context managers <async-context-managers>`:: + + async def send_http(session=None): + if not session: + # If no http session, create it with aiohttp + cm = aiohttp.ClientSession() + else: + # Caller is responsible for closing the session + cm = nullcontext(session) + + async with cm as session: + # Send http requests with session + .. versionadded:: 3.7 + .. versionchanged:: 3.10 + :term:`asynchronous context manager` support was added. + + .. function:: suppress(*exceptions) |