class_docstr: CARDINAL类
class_docstr_tok: ["CARDINAL\u7c7b"]
code: def chntext2cardinal(self):
      return chn2num(self.chntext)
  
imports: import argparse
  import codecs
  import os
  import re
  import string
  import sys
label_desc: Use image node_id 2 for calling the Cardinal obj's underlying member method code with example usage: obj.chntext2cardinal() and returns: chn2num