class_docstr: A reentrant lock, functions in a similar way to threading.RLock in that it
  can be acquired multiple times.  When the corresponding number of release()
  calls are made the lock will finally release the underlying file lock.
code: def __del__(self):
      self._lock = None
      # try to remove the file when we are done
      if not os.path.isfile(self.filename):
          return
      try:
          self.acquire(timeout=0)
          try:
              os.unlink(self.filename)
              removed = True
          except Exception:
              removed = False
          self.release()
          if not removed:
              try:
                  os.unlink(self.filename)
              except Exception:
                  pass
      except Exception:
          pass
  
imports: import os
  import time
  import atexit
  import tempfile
  import contextlib
  from multiprocessing import RLock
  from .None import exceptions
  from .None import constants
  from .None import portalocker
label_desc: Use image node_id 4 for calling the RLock obj's underlying member method code with example usage: obj.__del__() without return types