密码验证 - 至少一个大写，一个小写和一个数字[重复]

Question

我将如何验证输入以检查它是否包含至少 1 个数字、一个大写字母和一个小写字母。我已经查看了类似的问题，但它们似乎并不是我所需要的，例如只检查数字并拒绝字母，除了具有多个数字、大写字母和小写字母的任何内容之外，我需要它。

Answer 1

您可以像这样使用assert 结合any() 和string 内置模块：

import string

password = '1Aa'

try:
    assert any(i in string.ascii_lowercase for i in password)
    assert any(i in string.ascii_uppercase for i in password)
    assert any(i in string.digits for i in password)
except AssertionError as e:
    raise Exception('Invalid password!')

Answer 2

import re
def passwordagain():
password()

def password():
        print()
        password = input("Enter a secure password: ")
        if   re.search('[A-Z]',password) is None:
            print("Password must contain at least one capital letter and one number.")
            passwordagain() 
        elif re.search('[0-9]',password) is None:
            print("Password must contain at least one capital letter and one number.")
            passwordagain() 
        elif re.search('[a-z]',password) is None: 
            print("Password must contain at least one capital letter and one number.")
            passwordagain()          
        else:
            filename = ("password.");
            with open (filename, "w") as f:
                f.write (password)
            print()
            print("Password saved")