code: def code(self, code=None, ret_r=False):
          '''
          Args:
              code: (Optional) set code
              ret_r: (Optional) force to return Result. Default value is False
          returns:
              response code(0-success, others-failure) or self
          '''
          if code or ret_r:
              self._code = code
              return self
          return self._codf code(self, code=None, ret_r=False):
          '''
          Args:
              code: (Optional) set code
              ret_r: (Optional) force to return Result. Default value is False
          returns:
              response code(0-success, others-failure) or self
          '''
          if code or ret_r:
              self._code = code
              return self
          return self._code
docs: Args:
              code: (Optional) set code
              ret_r: (Optional) force to return Result. Default value is False
          returns:
              response code(0-success, others-failure) or self