tickets.py

class TicketMachine(object):

    def __init__(self, route1_name, route1_child, route1_adult, route2_name, route2_child, route2_adult):
        self.routes = [
            {'name': route1_name, 'child_fare': route1_child, 'adult_fare': route1_adult},
            {'name': route2_name, 'child_fare': route2_child, 'adult_fare': route2_adult}
        ]

        self.selected_route = None
        self.select_route1()  # Defaults to route 1 (from his screenshots)

        # Credit
        self.total_credits = 0.0  # Keeps track of sum of coins inserted by user

        # Number of tix for child, adult selected
        self.child_quantity = 0
        self.adult_quantity = 0

    def insert_quarter(self):
        self.total_credits += 0.25

    def insert_dollar(self):
        self.total_credits += 1.0

    def insert_two_dollar(self):
        self.total_credits += 2.0

    def select_route1(self):
        self.selected_route = self.routes[0]

    def select_route2(self):
        self.selected_route = self.routes[1]
    
    def plus_child_quantity(self):
        self.child_quantity += 1

    def plus_adult_quantity(self):
        self.adult_quantity += 1

    def minus_child_quantity(self):
        if self.child_quantity:
            self.child_quantity -= 1

    def minus_adult_quantity(self):
        if self.adult_quantity:
            self.adult_quantity -= 1
    
    def print_ticket(self):
        """
        buy or order ticket
        :return: bool, success
        """

        total_due = self.child_quantity * self.selected_route['child_fare'] + \
                    self.adult_quantity * self.selected_route['adult_fare']

        # No change returned so just take all the money they inserted, if it was enough
        if total_due and total_due < self.total_credits:
            # Reset all the things (ticket printed, now)
            self.child_quantity = self.adult_quantity = 0
            # self.total_credits = 0.0
            # TODO: If indeed this does not go to 0 but leave amount
            self.total_credits = self.total_credits - total_due
            self.select_route1()  # reset route to 1st route
            return True
        else:
            return False


class TrainStation(object):
    """
    Train class has 2 ticket classes initialized, its the view class, gives following options above
    This is your view class
    """
    def __init__(self):
        route1_name = 'Main St'
        route1_child = 1.0
        route1_adult = 2.0
        route2_name = 'King St'
        route2_child = 1.25
        route2_adult = 1.50
        self.ticket_machine1 = TicketMachine(route1_name, route1_child, route1_adult, route2_name, route2_child,
                                             route2_adult)

        route1_name = 'Burlington'
        route1_child = 3.0
        route1_adult = 5.0
        route2_name = 'Hamilton'
        route2_child = 7.0
        route2_adult = 10.0
        self.ticket_machine2 = TicketMachine(route1_name, route1_child, route1_adult, route2_name, route2_child,
                                             route2_adult)

        self.selected_machine = None

    def show_selected_machine_menu(self):
        # Interacting with selected machine

        # Wouldn't have to do this in python, since you can just get self.selected_machine.child_quantity etc..
        # child_quantity, adult_quantity, _, credit = self.selected_machine.get_status()
        print """
                        --------------------------------------------------------------------
                        Selected Route: {}   Child: ${}   Adult: ${}
                        Children: {}  Adults: {}
                        Credit: ${}
                        --------------------------------------------------------------------
                        """.format(self.selected_machine.selected_route['name'],
                                   self.selected_machine.selected_route['child_fare'],
                                   self.selected_machine.selected_route['adult_fare'],
                                   self.selected_machine.child_quantity,
                                   self.selected_machine.adult_quantity,
                                   self.selected_machine.total_credits,
                                   )

        print """
                         1. Select Route '{}'
                         2. Select Route '{}'
                         3. Add Adult
                         4. Remove Adult
                         5. Add Child
                         6. Remove Child
                         7. Insert Quarter
                         8. Insert Loonie
                         9. Insert Toonie
                        10. Print Ticket
                        11. Step away from machine""".format(self.selected_machine.routes[0]['name'],
                                                             self.selected_machine.routes[1]['name'])
        choice = int(input('Your choice: '))
        if choice == 1:
            self.selected_machine.select_route1()
        elif choice == 2:
            self.selected_machine.select_route2()
        elif choice == 3:
            self.selected_machine.plus_adult_quantity()
        elif choice == 4:
            self.selected_machine.minus_adult_quantity()
        elif choice == 5:
            self.selected_machine.plus_child_quantity()
        elif choice == 6:
            self.selected_machine.minus_child_quantity()
        elif choice == 7:
            self.selected_machine.insert_quarter()
        elif choice == 8:
            self.selected_machine.insert_dollar()
        elif choice == 9:
            self.selected_machine.insert_two_dollar()
        elif choice == 10:
            if self.selected_machine.print_ticket():
                print("Your ticket was printed!")
            else:
                print("No ticket for you.")
        elif choice == 11:
            self.selected_machine = None

    def show_select_machine_menu(self):
        # Selecting the machine first
        print """Welcome to the Ticket Counter!

                 1. Approach first machine.
                 2. Approach second machine.
                 3. Exit.
                 """
        choice = int(input('Your choice: '))
        if choice == 3:
            print("Good bye")
            exit()
        elif choice == 1:
            self.selected_machine = self.ticket_machine1
        elif choice == 2:
            self.selected_machine = self.ticket_machine2

    def main_loop(self):
        """
        No validation here, assuming buttons
        handle valid input
        :return:
        """
        while True:
            if self.selected_machine:
                self.show_selected_machine_menu()
            else:
                self.show_select_machine_menu()


# Start up the train station
ts = TrainStation()
ts.main_loop()