Question

Python

Create a function that checks user input in an attempt to create a password.

The valid_password function accepts a password as an argument and returns either true or false to indicate whether the password is valid. A valid password must be at least 7 characters in length, have at least one uppercase letter, one lowercase letter, and one digit. Respond with output to the user as to whether the password is valid or not, and allow the user to make additional attempts to create a valid password.  

Answer 1

def valid_password(password):
    upper, lower, digits = 0, 0, 0
    for ch in password:
        if ch.islower():
            lower += 1
        if ch.isupper():
            upper += 1
        if ch.isdigit():
            digits += 1
    return len(password) >= 1 and upper >= 1 and lower >= 1 and digits >= 1


def main():
    while True:
        password = input("Enter a password: ")
        if valid_password(password):
            print(password, "is valid!")
            break
        else:
            print(password, "is invalid. Try again!")


main()