Simple Password Checker

[SamHobbs]

Yesterday I posted an alternative but I do not see it now. It can be modified to produce the same output if desired.

#import sys
import string
  
def checkPasswordStrength(password):

    if len(password) <= 6:
        print("Password must be at least 7 characters")
        return
    teststring = "luds"
    testlist = list(teststring)
    special_characters = '!@#$%^&*()'
    for letter in password :
        if letter.islower() :
            testlist[0] = 'X'
        elif letter.isupper() :
            testlist[1] = 'X'
        elif letter.isdigit() :
            testlist[2] = 'X'
        elif letter in special_characters :
            testlist[3] = 'X'
    test = ''.join(testlist)
    if test == "XXXX":
        print("Password is valid")
        return
    message = "Password is not valid; missing:"
    if testlist[0] == 'l':
        message += " lowercase letter ";
    if testlist[1] == 'u':
        message += " upper case letter ";
    if testlist[2] == 'd':
        message += " digit ";
    if testlist[3] == 's':
        message += " special character ";
    print(message)
 
 
checkPasswordStrength('Billycash')