code: def hook(self):
      if self._orig_exit is None:
          self._orig_exit = sys.exit
          sys.exit = self.exit
  
      if self._exit_callback:
          atexit.register(self._exit_callback)
  
file_path: clearml/clearml/utilities/process/exit_hooks.py
imports: import atexit
  import os
  import signal
  import sys
  import six
  from ...logger import Logger
label_desc: Use image node_id 3 for calling the ExitHooks obj's underlying member method code with example usage: obj.hook() without return types