Patch by Chris Angelico.

Patch by Xiang Zhang.

* Replace "fd = -1" with "fd = INVALID_SOCKET"
* Replace "fd < 0" with "fd == INVALID_SOCKET": SOCKET_T is unsigned on Windows

Bug found by Pavel Belikov ("Fragment N1"):
http://www.viva64.com/en/b/0414/#ID0ECDAE

Bug found by Pavel Belikov ("Fragment N1"):
http://www.viva64.com/en/b/0414/#ID0ECDAE

Patch by Alakshendra Yadav.

Patch by Xiang Zhang.

Since 01ae1ac2daf4, it doesn't accept any arguments.

Patch by Michael Killough.

eliminate all internal uses of overridden methods.

or builtins for importing submodules or "from import".  Fixed handling an
error of non-string package name.

Original patch by Alexandre Vassalotti.

Users must include the same imports required to run directly in Python.

Patch by Costas.

Thanks to Xiang Zhang for the patch.

Windows.

Originally only b'PYTHONCASEOK' was being checked for in os.environ,
but that won't work under Windows where all environment variables are
strings (on OS X they are bytes).

Thanks to Eryk Sun for the bug report.

type issues be about 'path' instead of 'name'.

Thanks to Lev Maximov for the patch.

Patch by Stéphane Wirtel.

Patch by Ammar Askar.

Patch by Evelyn Mitchell.

Patch by John Hagen.

Patch by Jim Fulton.