set.py 文件源码

def parse_prefix_range(expr=None):
        pattern = r'^(?P<prefix>((\d+(\.\d+){3})|([0-9a-fA-F:]{2,40}))/\d+)' \
                  r'(\^(?P<ge>\d+)-(?P<le>\d+))?$'
        match = re.match(pattern, expr)
        if match:
            prefix = ipaddress.ip_network(unicode(match.group("prefix")))
            afi = "ipv%d" % prefix.version
            entry = {"prefix": prefix}
            try:
                entry["greater-equal"] = int(match.group("ge"))
                entry["less-equal"] = int(match.group("le"))
            except (IndexError, TypeError):
                pass
        else:
            raise ValueError("no match found")
        return {afi: [entry]}