code: def __init__(self):
      super().__init__()
      self._specified = True
  
file_path: fastNLP/fastNLP/core/metrics/backend/paddle_backend/backend.py
imports: import os
  from typing import List, Any
  import numpy
  from fastNLP.core.metrics.backend import Backend
  from fastNLP.core.utils.paddle_utils import paddle_to, _convert_data_device, is_in_paddle_dist
  from fastNLP.core.metrics.utils import AggregateMethodError
  from fastNLP.core.drivers.paddle_driver.dist_utils import fastnlp_paddle_all_gather
  from fastNLP.envs.imports import _NEED_IMPORT_PADDLE
label_desc: Use image node_id 1 to create a new PaddleBackend object from inherited base classes: Backend with example: obj = PaddleBackend()