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bpo-45693: Document port parameter to loop.create_server (GH-29760)

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Document the `port` parameter to `loop.create_server` in `asyncio`. In
particular, note that if `host` resolves to multiple network interfaces,
passing in `port=0` will result in a different random unused port being
used for each interface.

Automerge-Triggered-By: GH:ericvsmith
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Jim Crist-Harif 2021-11-24 13:43:57 -06:00 committed by GitHub
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Doc/library/asyncio-eventloop.rst
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@ -631,6 +631,11 @@ Creating network servers
assumed and a list of multiple sockets will be returned (most likely
one for IPv4 and another one for IPv6).
* The *port* parameter can be set to specify which port the server should
listen on. If ``0`` or ``None`` (the default), a random unused port will
be selected (note that if *host* resolves to multiple network interfaces,
a different random port will be selected for each interface).
* *family* can be set to either :data:`socket.AF_INET` or
:data:`~socket.AF_INET6` to force the socket to use IPv4 or IPv6.
If not set, the *family* will be determined from host name