让密码检查器识别 Python 中的特殊字符

Question

I'm struggling to get my password checker to recognize my special characters as true when they are inputted, any help would be appreciated!

import re

def password_cri():
    while True:
        password = input("Please enter your password:")
        if len(password)<5 and len(password)>15:
            print("Password denied: must be between 5 and 15 characters long.")
        elif re.search('[0-9]',password) is None:
            print("Password denied: must contain a number between 0 and 9")
        elif re.search('[A-Z]',password) is None:
            print("Password denied: must contain a capital letter.")
        elif re.search('[a-z]',password) is None:
            print("Password denied: must contain a lowercase letter.")
        elif re.search('[!, @, #, $, %, &, (, ), -, _, [, ], {, }, ;, :, ", ., /, <, >, ?]', password) is None:
            print("Password denied: must contain a special character")          
        else:
            print("Your password has been accepted.")
            break    

password_cri()

Answer 1

'[!, @, #, $, %, &, (, ), -, _, [, ], {, }, ;, :, ", ., /, <, >, ?]'

is probably not the regex you're looking for. Try

'[!@#$%&()\-_[\]{};:"./<>?]'

and note that - and ] are escaped because of how the [] regex block works.

Answer 2

That's not the proper regular expression for matching those characters.

I wouldn't actually recommend using a regular expression for this, since your matches are only one character long. Instead, make a string containing all the special characters you want to match, and then use any() and map() to determine if any of the special characters appear in the password.

password = "????????"
special_characters = '!@#$%&()-_[]{};:"./<>?'

if any(map(lambda x: x in password, special_characters)):
    print("Password contains special characters")
else:
    print("Password denied: must contain a special character")