docstr: initialize with the necessary elements
docstr_tok: ["initialize","with","the","necessary","elements"]
code: def __init__(self):
      """
      initialize with the necessary elements
      """
      assets_path = os.path.join(self.directory, "assets")
      gen_checkpoint_path = os.path.join(
          assets_path, "ernie_gen_couplet.pdparams"
      )
      self.model = ErnieForGeneration.from_pretrained("ernie-1.0")
      model_state = paddle.load(gen_checkpoint_path)
      self.model.set_dict(model_state)
      self.tokenizer = ErnieTokenizer.from_pretrained("ernie-1.0")
      self.rev_dict = self.tokenizer.vocab.idx_to_token
      self.rev_dict[self.tokenizer.vocab["[PAD]"]] = ""  # replace [PAD]
      self.rev_dict[self.tokenizer.vocab["[UNK]"]] = ""  # replace [PAD]
      self.rev_lookup = np.vectorize(lambda i: self.rev_dict[i])
  
file_path: PaddleHub/modules/text/text_generation/ernie_gen_couplet/module.py
imports: import ast
  import json
  import argparse
  import os
  import numpy
  import paddle
  import paddlehub
  from paddlehub.module.module import runnable
  from paddlehub.module.nlp_module import DataFormatError
  from paddlehub.common.logger import logger
  from paddlehub.module.module import moduleinfo, serving
  from paddlenlp.transformers import ErnieTokenizer, ErnieForGeneration
  from ernie_gen_couplet.decode import beam_search_infilling
label_desc: Use image node_id 1 to create a new ErnieGen object from inherited base classes: hub with example: obj = ErnieGen()