Login system 1

import getpass, hashlib


class Login_System:

    # Test database containing user:passwordhash
    database = {'user1':'72b302bf297a228a75730123efef7c4', #Password = banana
                'admin':'21232f297a57a5a743894a0e4a801fc3'} #Password = admin

    def __init__(self):
        '''
        Simple constructor
        '''

        self.logged = False

    def main_loop(self):

        '''
        Simple login loop
        '''

        while not self.logged:

            h = hashlib.md5()

            user = raw_input('Username: ')
            psw = h.update(getpass.getpass('Password:'))

            psw = h.hexdigest()

            if user in self.database:

                if self.database[user] == psw:

                    self.logged = True

                    return True

                else:
                    rep = raw_input('Wrong password, quit? [Y/N]').lower()

                    if rep == 'y':

                        return False

            else:
                rep = raw_input('Unsername not found, quit? [Y/N]').lower()

                if rep == 'y':

                    return False


l_sys = Login_System()
rep = l_sys.main_loop()

if rep:
    print('Succesfully logged!')

raw_input('Press enter to exit.')