add private method to enum to support replacing global constants with Enum members:
- search for candidate constants via supplied filter
- create new enum class and members
- insert enum class and replace constants with members via supplied module name
- replace __reduce_ex__ with function that returns member name, so previous Python versions can unpickle
modify IntEnum classes to use new method

Patch by Karan Goel.

Based on patch by Franck Michea.

Before:
<socket.socket fd=3, family=2, type=1, proto=0, laddr=('0.0.0.0', 0)>

Now:
<socket.socket fd=3, family=AddressFamily.AF_INET, type=SocketType.SOCK_STREAM, proto=0, laddr=('0.0.0.0', 0)>

Closes #18720.

are now created non-inheritable; add functions os.get/set_inheritable(),
os.get/set_handle_inheritable() and socket.socket.get/set_inheritable().

ModuleNotFoundError.

Fix line buffering of socket._fileobject

Issue #15842: the SocketIO.{readable,writable,seekable} methods now raise ValueError when the file-like object is closed.
Patch by Alessandro Moura.

Patch by Matt Joiner.

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r88622 | antoine.pitrou | 2011-02-26 00:07:44 +0100 (sam., 26 févr. 2011) | 5 lines

  Issue #7322: Trying to read from a socket's file-like object after a timeout
  occurred now raises an error instead of silently losing data.
  Patch by Ross Lagerwall.
........

occurred now raises an error instead of silently losing data.
Patch by Ross Lagerwall.

socket is now always non-blocking, regardless of the operating system.

raising a ValueError, to fix repr().

deallocated without explicit closing.  These warnings are silenced by
default, except in pydebug mode.

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r85420 | antoine.pitrou | 2010-10-13 18:17:14 +0200 (mer., 13 oct. 2010) | 5 lines

  Issue #10041: The signature of optional arguments in socket.makefile()
  didn't match that of io.open(), and they also didn't get forwarded
  properly to TextIOWrapper in text mode.  Patch by Kai Zhu.
........

didn't match that of io.open(), and they also didn't get forwarded
properly to TextIOWrapper in text mode.  Patch by Kai Zhu.

non-blocking mode: they return None when an operation would block (instead
of raising an exception).

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r84825 | antoine.pitrou | 2010-09-15 10:39:25 +0200 (mer., 15 sept. 2010) | 3 lines

  Add a comment explaining why SocketIO is needed
........
  r84826 | antoine.pitrou | 2010-09-15 11:32:45 +0200 (mer., 15 sept. 2010) | 3 lines

  Improve docs for socket.makefile() and SocketIO
........
  r84830 | antoine.pitrou | 2010-09-15 13:12:57 +0200 (mer., 15 sept. 2010) | 3 lines

  Reverted unwanted change in r84826
........

objects supporting the whole socket API (rather than the "raw"
_socket.socket objects).

Fix issue 9794: adds context manager protocol to socket.socket so that socket.create_connection() can be used with the 'with' statement.

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r84597 | antoine.pitrou | 2010-09-07 22:42:19 +0200 (mar., 07 sept. 2010) | 5 lines

  Issue #8574: better implementation of test.support.transient_internet().
  Original patch by Victor.
........
  r84598 | antoine.pitrou | 2010-09-07 23:05:49 +0200 (mar., 07 sept. 2010) | 6 lines

  Issue #9792: In case of connection failure, socket.create_connection()
  would swallow the exception and raise a new one, making it impossible
  to fetch the original errno, or to filter timeout errors.  Now the
  original error is re-raised.
........
  r84599 | antoine.pitrou | 2010-09-07 23:09:09 +0200 (mar., 07 sept. 2010) | 4 lines

  Improve transient_internet() again to detect more network errors,
  and use it in test_robotparser. Fixes #8574.
........

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r84597 | antoine.pitrou | 2010-09-07 22:42:19 +0200 (mar., 07 sept. 2010) | 5 lines

  Issue #8574: better implementation of test.support.transient_internet().
  Original patch by Victor.
........
  r84598 | antoine.pitrou | 2010-09-07 23:05:49 +0200 (mar., 07 sept. 2010) | 6 lines

  Issue #9792: In case of connection failure, socket.create_connection()
  would swallow the exception and raise a new one, making it impossible
  to fetch the original errno, or to filter timeout errors.  Now the
  original error is re-raised.
........
  r84599 | antoine.pitrou | 2010-09-07 23:09:09 +0200 (mar., 07 sept. 2010) | 4 lines

  Improve transient_internet() again to detect more network errors,
  and use it in test_robotparser. Fixes #8574.
........

would swallow the exception and raise a new one, making it impossible
to fetch the original errno, or to filter timeout errors.  Now the
original error is re-raised.

avoid issues when socket.close is called from a __del__ method.

avoid issues when socket.close is called from a __del__ method.