How to display the values ​​of a key in a dictionary if we don't know its name?

Question

Python

Good evening. Let's agree that we have a dictionary that contains Login:Password pairs. If the user (through input, of course) enters a login and this login is in our dictionary, then the password is displayed to him. The difficulty lies in the fact that we do not know what login the user will enter, therefore, neither the name nor the order of this login in the dictionary is known. How can I do that? Thank you.

Answer 1

users = {
    'expp': 'qwerty',
    'sergey-gornostaev': 'nA7L$45f_uKv'
}

username = input('Введите имя пользователя')
if username in users:
    password = input('Введите пароль')
    if password == users[username]:
        print('Добро пожаловать, ' + username)
    else:
        print('Неверный пароль')

Answer 2

There are two dictionary methods for this.
1) .items() - Throws us key value pairs.
2) .keys() - returns all keys.