IP地址 密码复杂度 正则

import socket


def is_valid(ip):
    """Returns true if the given string is a well-formed IP address.

    Supports IPv4 and IPv6.
    """

    if len(ip.split(".")) != 4:
        return False

    if not ip or '\x00' in ip:
        # getaddrinfo resolves empty strings to localhost, and truncates
        # on zero bytes.
        return False
    try:
        res = socket.getaddrinfo(ip, 0, socket.AF_UNSPEC,
                                 socket.SOCK_STREAM,
                                 0, socket.AI_NUMERICHOST)
        return bool(res)
    except socket.gaierror as e:
        if e.args[0] == socket.EAI_NONAME:
            return False
    return True

 

 必须包含 数字、字母和特殊符号，8-30位长度

(?=.*\d)(?=.*[a-zA-Z])(?=.*[^a-zA-Z0-9]).{8,30}

(?=.*[0-9])(?=.*[a-zA-Z])(?=.*[^a-zA-Z0-9]).{8,30}