class_docstr: Abstract base class for a file lock object.
docstr: Releases the lock and sets self._lock_file_fd to None.
docstr_tok: ["Releases","the","lock","and","sets","self._lock_file_fd","to","None","."]
code: def _release(self):
      """Releases the lock and sets self._lock_file_fd to None."""
      raise NotImplementedError
  
imports: import logging
  import time
  from threading import Lock
  from ._error import Timeout
label_desc: Use image node_id 6 for calling the BaseFileLock obj's underlying member method code with example usage: obj._release() without return types