utils.py 文件源码

def __getstate__(self):
    if not self._new_args_called:
      raise RuntimeError(
          "You must use argument `protocol=cPickle.HIGHEST_PROTOCOL` "
          "when using `pickle` or `cPickle` to be able pickling NoSQL.")
    self._new_args_called = False
    return self.path, self.read_only, self.cache_size