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.bag_list = list()
        # current_bag_price gives the money that customer owe to the market including any payment by the customer
        self.current_bag_price = 0
        # bag_price is the total money that the customer owes
        self.bag_price = 0
        # product_list contains all the products' details that are available in market
        self.product_list = Product()
        # amount_paid is the amount received from customer at any moment
        self.amount_paid = 0
    
    # Function to: Accept Payment
    def accept_payment(self, some_amount):
        # Checking if the money is positive or not
        if some_amount >= 0:
            self.current_bag_price = self.current_bag_price - some_amount
            self.amount_paid += some_amount
        else:
            print("We don't accept negative money!")
    
    # Function to: Scan products, one at a time
    def scan_item(self, some_product):
        # Adding the customer's product to their bag
        try:
            index = self.product_list.barcode.index(int(some_product))
            self.bag_list.append(index)
            self.bag_price += self.product_list.price[index]
            self.current_bag_price += self.product_list.price[index]
            print(self.product_list.name[index], ' - ', self.product_list.price[index])
        except:
            # If no such product is found in the inventory
            print('This product does not exist in our inventory.')
    
    # Function to: Print a receipt for the user and return the balance
    def print_receipt(self):
        # Printing the receipt as per the problem statement
        print('----- Final Receipt -----')
        for item in self.bag_list:
            print(self.product_list.name[item], self.product_list.price[item])
        print('Total amount due: $' + str(self.bag_price))
        print('Amount received: $' + str(self.amount_paid))
        print('Change given: $' + str(self.amount_paid - self.bag_price))
        print('Thank you for shopping at FedUni!')
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.current_bag_price > 0:
        prompt = "Payment due: $" + str(regn.current_bag_price) + ". Please enter an amount to pay: "
        amount = input(prompt)
        try:
            regn.accept_payment(float(amount))
        except:
            print('Please enter valid money')
        
    #...