parser.py 文件源码

def parse_and(self):
        lineno = self.stream.current.lineno
        left = self.parse_not()
        while self.stream.skip_if('name:and'):
            right = self.parse_not()
            left = nodes.And(left, right, lineno=lineno)
            lineno = self.stream.current.lineno
        return left