code: def parser_factory(lang):
      
  
      class_ = {
              'zh-Hans' : ChineseSimplifiedParser,
              'zh-Hant' : ChineseTraditionalParser,
              'zh' : ChineseParser,
              'yue-Hans' : CantoneseSimplifiedParser,
              'yue-Hant' : CantoneseTraditionalParser,
              'yue' : CantoneseParser,
              'thai' : ThaiParser,
              'th' : ThaiParser,
              }.get(lang)
      return class_()
docs: Returns a Parser object specific to the language specified by :param:`lang`.
  
      :param lang: A string naming the desired parser.  See the keys in :var:`class_`
      for valid strings.
  
      :Example:
  
      >>> chinese_parser = parser_factory('zh-Hans')
      >>> isinstance(chinese_parser, ChineseSimplifiedParser)
      True
  
      >>> cantonese_parser = parser_factory('yue-Hant')
      >>> isinstance(cantonese_parser, CantoneseTraditionalParser)
      True