parser.py 文件源码

def restart(self, string):
        """
        Restarts parsing with new string
        Returns self for chaining.
        """

        try:
            self.tokens = [
                ActionParser.Token(type, string)
                for (type, string, trash, trash, trash)
                in generate_tokens( iter([string]).next )
                if type != TokenType.ENDMARKER
            ]
        except TokenError:
            self.tokens = None
        self.index = 0
        return self