class_docstr: FRACTION类
class_docstr_tok: ["FRACTION\u7c7b"]
code: def fraction2chntext(self):
      numerator, denominator = self.fraction.split("/")
      return num2chn(denominator) + "分之" + num2chn(numerator)
  
imports: import argparse
  import csv
  import os
  import re
  import string
  import sys
label_desc: Use image node_id 3 for calling the Fraction obj's underlying member method code with example usage: obj.fraction2chntext() and returns: unknown