在Python中验证给定列表中的IP地址

import re

def validate_ip(ip):
    pattern = r'^((25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$'
    if re.match(pattern, ip):
        return True
    else:
        return False

ip_list = ['192.168.0.1', '10.0.0.256', '172.16.0.0', '2001:0db8:85a3:0000:0000:8a2e:0370:7334']

for ip in ip_list:
    if validate_ip(ip):
        print(ip + " is a valid IP address.")
    else:
        print(ip + " is not a valid IP address.")