code: def has_parser(self, url_info: URLInfo):
          '''Return whether a parser has been created for the URL.'''
          key = self.url_info_key(url_info)
          return key in self._parserf has_parser(self, url_info: URLInfo):
          '''Return whether a parser has been created for the URL.'''
          key = self.url_info_key(url_info)
          return key in self._parsers
docs: Return whether a parser has been created for the URL.