[issue16802] fileno argument to socket.socket() undocumented

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> It has at least one potential use.  On Windows socket.detach() returns a
> socket handle but there is no documented way to close it -- os.close()
> will not work.  The only way to close it that I can see (without resorting
> to ctypes) is with something like
> 
>     socket.socket(fileno=handle).close()

There is an alternative (documented) interface:

    socket.fromfd(handle, socket.AF_INET, socket.SOCK_STREAM).close()

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<http://bugs.python.org/issue16802>
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