routing.py 文件源码

def get_rules(self, map):
        for rulefactory in self.rules:
            for rule in rulefactory.get_rules(map):
                new_defaults = subdomain = None
                if rule.defaults:
                    new_defaults = {}
                    for key, value in iteritems(rule.defaults):
                        if isinstance(value, string_types):
                            value = format_string(value, self.context)
                        new_defaults[key] = value
                if rule.subdomain is not None:
                    subdomain = format_string(rule.subdomain, self.context)
                new_endpoint = rule.endpoint
                if isinstance(new_endpoint, string_types):
                    new_endpoint = format_string(new_endpoint, self.context)
                yield Rule(
                    format_string(rule.rule, self.context),
                    new_defaults,
                    subdomain,
                    rule.methods,
                    rule.build_only,
                    new_endpoint,
                    rule.strict_slashes
                )