code: def lock_ctx(lock_dir=None, keep_lock=False, **kw):
      get_lock(lock_dir=lock_dir, **kw)
      yield
      if not keep_lock:
          release_lock()
  
imports: from __future__ import absolute_import, print_function, division
  import atexit
  import os
  import socket
  import time
  import logging
  from six import PY3
  from contextlib import contextmanager
  import numpy
  from theano import config
label_desc: Use image node_id 2 for calling a global function with example usage: lock_ctx(lock_dir, keep_lock) without return types