code: def __init__(self):
      self._lock = threading.Lock()
      self._fd = None
      self._pid = None
  
file_path: catboost/contrib/python/joblib/joblib/externals/loky/backend/resource_tracker.py
imports: import os
  import shutil
  import sys
  import signal
  import warnings
  import threading
  from _multiprocessing import sem_unlink
  from multiprocessing import util
  from .None import spawn
label_desc: Use image node_id 1 to create a new ResourceTracker object  with example: obj = ResourceTracker()