Question

In PYTHON:

Write a program that asks for a password from a user and checks if it satisfies the conditions:

• Contains at least one lowercase letter (a-z).
• Contains at least one uppercase letter (A-Z).
• Contains at least one digit (0-9).
• Minimum length 6 characters.
• Contains no spaces.

If the password is valid, then the program prints “password accepted”. Otherwise, it keeps asking for more passwords from the user until a valid password is obtained.

Hint: You might like to check the string methods that start with the letter ‘i’.

Answer 1

# do comment if any problem arises

# Code

# this method returns true if given password has atleast one lowercase letter

def has_lower(password):

    for char in password:

        if char.islower():

            return True

    return False

# this method returns true if given password has atleast one uppercase letter

def has_upper(password):

    for char in password:

        if char.isupper():

            return True

    return False

# this method returns true if given password has atleast one digit

def has_digit(password):

    for char in password:

        if char.isnumeric():

            return True

    return False

# this method returns true if given password is valid

def isValid(password):

    # if length of password is less than 6

    if len(password) < 6:

        return False

    # if password contains spaces

    if ' ' in password:

        return False

    # if password doesnot has lowercase letter

    if not has_lower(password):

        return False

    # if password doesnot has uppercase letter

    if not has_upper(password):

        return False

    # if password doesnot has digit

    if not has_digit(password):

        return False

    # if all above conditions are satisfied then password is valid

    return True

def main():

    password = input("Enter a password: ")

    # while password is not valid

    while not isValid(password):

        print("Invalid password!\n")

        # reprompt for password

        password = input("Enter a password: ")

    print("Password accepted")

main()

Screenshot of code:

Output: