code: def add_record_length_check(self,
                           code=RECORD_LENGTH_CHECK_FAILED,
                           message=MESSAGES[RECORD_LENGTH_CHECK_FAILED],
                           modulus=1):
          
  
          t = code, message, modulus
          self._record_length_checks.append(t)
docs: Add a record length check, i.e., check whether the length of a record is
          consistent with the number of expected fields.
  
          Arguments
          ---------
  
          `code` - problem code to report if a record is not valid, defaults to
          `RECORD_LENGTH_CHECK_FAILED`
  
          `message` - problem message to report if a record is not valid
  
          `modulus` - apply the check to every nth record, defaults to 1 (check
          every record)