class_docstr: 中文数字字符
class_docstr_tok: ["\u4e2d\u6587\u6570\u5b57\u5b57\u7b26"]
code: def __str__(self):
      return str(self.value)
  
imports: import argparse
  import codecs
  import os
  import re
  import string
  import sys
label_desc: Use image node_id 2 for calling the ChineseNumberDigit obj's underlying member method code with example usage: obj.__str__() and returns: str