Validation of a Password - Python

Question

So I have to create code that validate whether a password:

• Is at least 8 characters long
• Contains at least 1 number
• Contains at least 1

Answer 1

uppercase_letter = ['A', 'B','C', 'D','E','F','G','H','I','J','K','L','M','N','O',
            'P','Q','R','S','T','U','V','W','X','Y','Z']

number = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]

import re

info ={}

while True:

    user_name = input('write your username: ')

    if len(user_name) > 15:
        print('username is too long(must be less than 16 character)')
    elif len(user_name) < 3 :
        print('username is short(must be more than 2 character)')
    else:
        print('your username is', user_name)
        break


while True:   

    password= input('write your password: ')

    if len(password) < 8 :
        print('password is short(must be more than 7 character)')

    elif len(password) > 20:
        print('password is too long(must be less than 21 character)') 

    elif re.search(str(uppercase_letter), password ) is None :
        print('Make sure your password has at least one uppercase letter in it')

    elif re.search(str(number), password) is None :
        print('Make sure your password has at least number in it')

    else:
        print('your password is', password)
        break

info['user name'] = user_name

info['password'] = password

print(info)