class_docstr: 用于中文数字系统的数学符号 (繁/简体), e.g.
  positive = ['正', '正']
  negative = ['负', '負']
  point = ['点', '點']
class_docstr_tok: ["\u7528\u4e8e\u4e2d\u6587\u6570\u5b57\u7cfb\u7edf\u7684\u6570\u5b66\u7b26\u53f7","(","\u7e41\/\u7b80\u4f53",")",",","e.g",".","positive","=","[","'","\u6b63","'",",","'","\u6b63","'","]","negative","=","[","'","\u8d1f","'",",","'","\u8ca0","'","]","point","=","[","'","\u70b9","'",",","'","\u9ede","'","]"]
code: def __iter__(self):
      for v in self.__dict__.values():
          yield v
  
imports: import argparse
  import codecs
  import os
  import re
  import string
  import sys
label_desc: Use image node_id 2 for calling the MathSymbol obj's underlying member method code with example usage: obj.__iter__() without return types