gee.py

class Dog:
    attr1 = 'Mammal'
    attr2 = 'Dog'

    def fun(self):
        print(f'I am a {self.attr1}')
        print(f'I am a {self.attr2}')


Rodger = Dog()
print(Rodger.attr1)
Rodger.fun()
print(Rodger.attr2)


class Person:
    def __init__(self, name):
        self.name = name

    def say_hi(self):
        print(f'Hello, my name is {self.name}')

p = Person('Nicki')
p.say_hi()


name = input('Enter your name: ')
print(f'Hi! {name}, welcome to the car rental system')

class Rental:
    def __init__(self, list, name):
        self._carlist = list
        self._name = name
        self._lendDict = {}


    def Displaycars(self):
        print(f'List of cars available for rent are here:\n', self._name)
        for car in self._carlist:
            print(car)


    def Lendcars(self, user, car):
        if car not in self._lendDict.keys():
            self._lendDict.update({car:user})
            print('Lender-car is updated in system, you can take car with you')
        else:
            print(f'Car is already being used by {self._lendDict[car]}')


    def Addcar(self, car):
        if car not in self._carlist:
            self._carlist.append(car)
        else:
            pass
        print('Car database is updated now')


    def Returncar(self, car):
        self._lendDict.pop(car)
        print('Your car has been returned!')


if __name__ == '__main__':
    rental = Rental(['Rav4', 'Camry', 'Hyundai-i10', 'KIA'], 'Mike Car rental')

    while(True):
        print(f'Welcome to the {rental._name} management system, Enter your choice here')
        print('1, Display cars')
        print('2, Lend a car')
        print('3, Add a car')
        print('4, Return a car')
        print('5, Exit')
        user_choice = int(input('Your choice??'))
        if user_choice not in [1,2,3,4,5]:
            print('Not a valid choice, please choose again')
            break
        else:
            user_choice = user_choice
            if user_choice == 1:
                rental.Displaycars()

            elif user_choice == 2:
                print(f'car list {rental._carlist}')
                user = input("Enter your 'name': ")
                car = input('Enter the name of the car you want: ')
                rental.Lendcars(user, car)

            elif user_choice == 3:
                car = input("Enter the car name: ")
                rental.Addcar(car)
            elif user_choice == 4:
                car = input('Enter the car to return')
                rental.Returncar(car)
            else:
                break