docstr: 自由问答
docstr_tok: ["\u81ea\u7531\u95ee\u7b54"]
code: def answer_generation(
      self,
      text: str,
      min_dec_len: int = 2,
      seq_len: int = 512,
      topp: float = 0.9,
      penalty_score: float = 1.2,
  ) -> str:
      """
      自由问答
      """
      text = "问题：{} 回答：".format(text)
      return self.custom_generation(
          text,
          min_dec_len,
          seq_len,
          topp,
          penalty_score,
          stop_token="",
          task_prompt="qa",
          penalty_text="[gEND]",
          choice_text="",
          is_unidirectional=True,
          min_dec_penalty_text="。？：！[<S>]",
          logits_bias=-5,
          mask_type="paragraph",
      )
  
imports: import argparse
  import json
  import os
  import requests
  from paddlehub.module.module import moduleinfo
  from paddlehub.module.module import runnable
  from paddlehub.module.module import serving
label_desc: Use image node_id 7 for calling the ERNIEZeus obj's underlying member method code with example usage: obj.answer_generation(text, min_dec_len, seq_len, topp, penalty_score) and returns: self