It seems socketpair is added for Windows in Py3.5, but it isn't imported with `from socket import *`. Can it be added to __all__?

I don't see any special casing for windows in the socketpair code in the current socket module, nor do I see any mention of socketpair in the 3.5 whatsnew.  Based on a quick scan of the socket code I don't see how socketpair could be defined on a platform without also automatically being included in __all__.

> nor do I see any mention of socketpair in the 3.5 whatsnew
socket.socketpair has a versionchanged 3.5: Windows support added.

See issue 18643, which added a Windows implementation of socketpair(). Since it's not defined in the _socket extension module, it isn't added to socket.__all__. Someone simply forgot to add `__all__.append("socketpair")` after the definition on line 485.

Ah, I see.  Yes, the normal "automatic adding" probably made that easy to forget.  The lack of "windows" comment there fooled me...it looks like what was really added was "support for any platform that supports sockets but not socketpair" :)

New changeset ac2bc921169c by Victor Stinner in branch '3.5':
Issue #27698: Add socketpair to socket.__all__ on Windows
https://hg.python.org/cpython/rev/ac2bc921169c

The issue should now be fixed by my change. Thanks for the bug report!

No problem. Thank you for fixing it. :-)