docs: def is_local_port_open(port):
      """
      Args:
          port (int):
  
      Returns:
          bool:
  
      References:
          http://stackoverflow.com/questions/7436801/identifying-listening-ports-using-python
  
      CommandLine:
          python -m utool.util_web is_local_port_open --show
  
      Example:
          >>> # DISABLE_DOCTEST
          >>> from utool.util_web import *  # NOQA
          >>> port = 32183
          >>> assert is_local_port_open(80) is False, 'port 80 should always be closed'
          >>> assert is_local_port_open(port) is True, 'maybe this port is actually used?'
      """
      import socket
      s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      result = s.connect_ex(('127.0.0.1', port))
      s.close()
      return result != 0