Getting a password checker to recognize special characters in Python

user_18368614 0
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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()
special-characters python
2 Answers
'[!, @, #, $, %, &, (, ), -, _, [, ], {, }, ;, :, ", ., /, <, >, ?]'

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

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

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

user_18797830

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")
user_177698150
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