代码

import re


def password_is_ok(password: str) -> bool:
    """
    	1. 密码只能是字母数字组合
    	2. 密码必须包含大小写字母以及数字
    """
    result = re.findall('^(?=.*\d+)(?=.*[a-z])(?=.*[A-Z])[0-9a-zA-Z]{8,16}$', password)
    return True if result else False


if __name__ == '__main__':
    s = '12345678xyzF aa123 aA123456 985211aaa admin admin66Z'
    for password in s.split():
        print(password, password_is_ok(password))

运行结果