code: def __enter__(self):
      return self._lock.__enter__()
  
imports: import itertools
  import logging
  import multiprocessing.util
  import os
  import re
  import sys
  import socket
  import threading
  import weakref
  import psutil
label_desc: Use image node_id 3 for calling the ForkAwareThreadLock obj's underlying member method code with example usage: obj.__enter__() and returns: self