flask.py 文件源码

def build_url(self, **kwargs):
        arg = request.args.copy()
        view_args = request.view_args
        arg.update(view_args)
        for attr in kwargs.keys():
            if attr in arg:
                arg.pop(attr)
        arg.update(kwargs.items())
        rule = request.url_rule
        result = rule.build(arg)
        return result[1]