code: def _stop_tunnel(cmd):
      pexpect.run(cmd)
  
file_path: catboost/contrib/python/pyzmq/py3/zmq/ssh/tunnel.py
imports: import atexit
  import os
  import re
  import signal
  import socket
  import sys
  import warnings
  from getpass import getpass, getuser
  from multiprocessing import Process
label_desc: Use image node_id 8 for calling a global function with example usage: _stop_tunnel(cmd) without return types