[issue41711] Socker send method throws a timeout exception

[pig]

New submission from pig <pppig0921 at 163.com>:

When tcpclient.py and tcpserver.py files are run on macOS at the same time, custom exceptions will be thrown due to exceeding the given timeout.Timed out: Timed out When one or two files are running on window, socker.send throws an exception socket.timeout: Timed out.
The description of the send function I saw on the [web site](https://docs.python.org/3.7/library/socket.html#socket.socket.send) does not seem to throw an exception

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41711>
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