docs: def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None):
      """Connect to *address* and return the socket object.
  
      Convenience function.  Connect to *address* (a 2-tuple ``(host,
      port)``) and return the socket object.  Passing the optional
      *timeout* parameter will set the timeout on the socket instance
      before attempting to connect.  If no *timeout* is supplied, the
      global default timeout setting returned by :func:`getdefaulttimeout`
      is used. If *source_address* is set it must be a tuple of (host, port)
      for the socket to bind as a source address before making the connection.
      An host of '' or port 0 tells the OS to use the default.
      """
  
      host, port = address
      err = None
      for res in getaddrinfo(host, port, 0 if has_ipv6 else AF_INET, SOCK_STREAM):
          af, socktype, proto, _canonname, sa = res
          sock = None
          try:
              sock = socket(af, socktype, proto)
              if timeout is not _GLOBAL_DEFAULT_TIMEOUT:
                  sock.settimeout(timeout)
              if source_address:
                  sock.bind(source_address)
              sock.connect(sa)
              return sock
          except error:
              err = sys.exc_info()[1]
              six.exc_clear()
              if sock is not None:
                  sock.close()
      if err is not None:
          raise err
      else:
          raise error("getaddrinfo returns an empty list")