class_docstr: PERCENTAGE类
class_docstr_tok: ["PERCENTAGE\u7c7b"]
code: def chntext2percentage(self):
      return chn2num(self.chntext.strip().strip("百分之")) + "%"
  
imports: import argparse
  import codecs
  import os
  import re
  import string
  import sys
label_desc: Use image node_id 2 for calling the Percentage obj's underlying member method code with example usage: obj.chntext2percentage() and returns: unknown