code: def release(self):
          
          if self._lock_fd is not None:
              os.close(self._lock_fd)
              try:
                  os.remove(self._lock_filename)
              except OSError:
                  # Hmm, someone deleted our lock while we had it locked?
                  # Nothing we can do, so just continue
                  pass
docs: Release the lock.
  
          :return: Nothing