密码验证 - 至少一个大写，一个小写字母和一个数字

Question

如何验证输入以检查它是否至少包含1个数字，一个大写字母和一个小写字母。我看过类似的问题，他们似乎并不完全是我需要的东西，例如只检查数字和拒绝信件，除了一个以上的数字，大写字母和小写字母外，我需要它。

Answer 1

您可以使用assert与any()和string结合内置模块是这样的：

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")