ITECH1400 – Foundations of Programming – SEM2/18 School of Science, Engineering and Information Technology CRICOS Provider No. 00103D Page 1 of 7 ITECH1400 - Assignment 1 – Supermarket Self-Service...

checkoutregister.py
from product import Product
class CheckOutRegister:
    # Function to: A default constructor that takes no arguments and initializes a new object and its properties,
    def __init__(self):
        # cart contains the products that are scanned by the customer
        self.cart = list()
        # remaining gives the money that customer owe to the market including any payment by the customer
        self.remaining = 0
        # total_remaining is the total money that the customer owes
        self.total_remaining = 0
        # products contains all the products' details that are available in market
        self.products = Product()
        # amount_received is the amount received from customer at any moment
        self.amount_received = 0
    
    # Function to: Accept Payment
    def accept_payment(self, some_amount):
        # editing the arguments of the check out register and checking if the money is positive or not
        if some_amount >= 0:
            self.remaining = self.remaining - some_amount
            self.amount_received += some_amount
        else:
            print("We don't accept negative money!")
    
    # Function to: Scan one or more products
    def scan_item(self, some_product):
        # Adding the customer's product to their cart
        try:
            index = self.products.barcode.index(int(some_product))
            self.cart.append(index)
            self.total_remaining += self.products.price[index]
            self.remaining += self.products.price[index]
            print(self.products.name[index], ' - ', self.products.price[index])
        except:
            # If the product (Barcode) is not in the inventory
            print('This product does not exist in our inventory.')
    
    # Function to: Provide change and print a receipt for the user
    def print_receipt(self):
        print('----- Final Receipt -----')
        
        for item in self.cart:
            print(self.products.name[item], self.products.price[item])
        
        print('Total amount due: $' + str(self.total_remaining))
        print('Amount received: $' + str(self.amount_received))
        print('Change given: $' + str(self.amount_received - self.total_remaining))
        
        print('Thank you for shopping at FedUni!')
product.py
class Product:
    # Function to: A default constructor that takes no arguments and initializes a new object and its properties
    def __init__(self):
        self.name = ['Milk, 2 Litres', 'Bread']
        self.barcode = [123, 456]
        self.price = [2.0, 3.5]
main.py
from checkoutregister import CheckOutRegister
# Variable to check if there are more customers or not
newCustomer = True
# Loop for all the customers
while newCustomer:
    print('----- Welcome to FedUni checkout! -----')
    # Creating a new instance of the CheckOutRegister class
    regn = CheckOutRegister()
    # Variable to check if there are more products that a customer wants to buy
    loopProduct = True
    # Loop for all the products that a customer wants to buy from supermarket
    while loopProduct:
        product = input('Please enter the barcode of your item: ')
        # Scanning the product into cart
        regn.scan_item(product)
        nxt = input('Would you like to scan another product? (Y/N)')
        if str(nxt).lower() == 'y':
            continue
        elif str(nxt).lower() == 'n':
            loopProduct = False
    
    # Receiving Payment from the customer
    while regn.remaining > 0:
        prompt = "Payment due: $" + str(regn.remaining) + ". Please enter an amount to pay: "
        amount = input(prompt)
        try:...