class_docstr: 中文数字/数位字符
  每个字符除繁简体外还有一个额外的大写字符
  e.g. '陆' 和 '陸'
class_docstr_tok: ["\u4e2d\u6587\u6570\u5b57\/\u6570\u4f4d\u5b57\u7b26","\u6bcf\u4e2a\u5b57\u7b26\u9664\u7e41\u7b80\u4f53\u5916\u8fd8\u6709\u4e00\u4e2a\u989d\u5916\u7684\u5927\u5199\u5b57\u7b26","e.g",".","'","\u9646","'","\u548c","'","\u9678","'"]
code: def __str__(self):
      return "10^{}".format(self.power)
  
imports: import argparse
  import codecs
  import os
  import re
  import string
  import sys
label_desc: Use image node_id 2 for calling the ChineseNumberUnit obj's underlying member method code with example usage: obj.__str__() and returns: str