code: def __enter__(self):
      return self._lock.__enter__()
  
imports: import os
  import itertools
  import sys
  import weakref
  import atexit
  import threading
  from subprocess import _args_from_interpreter_flags
  from .None import process
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