Question

In python 3 please:

This program extends the earlier "Online shopping cart" program. (Start working from your Program 7).

(1) Build the ShoppingCart class with the following data attributes and related methods. Note: Some can be method stubs (empty methods) initially, to be completed in later steps.(3 pt)

● Parameterized constructor which takes the customer name and date as parameters

● Attributes

• ○ customer_name (string)

• ○ current_date (string)

• ○ cart_items (list)

● Methods

○ add_item()

■ Adds an item to the cart_items list. Has parameter ItemToPurchase. Does not return anything.

○ get_cost_of_cart()

■ Determines and returns the total cost of items in the cart. Has no parameters.

○ print_total()

• Outputs total of objects in the cart.

• If the cart is empty, output this message:

SHOPPING CART IS EMPTY

○ print_descriptions()

■ Outputs each item's description.

Ex. of print_total() output:

John Doe's Shopping Cart - February 1, 2016
Number of Items: 8

Nike Romaleos 2 @ $189 = $378
Chocolate Chips 5 @ $3 = $15
Powerbeats 2 Headphones 1 @ $128 = $128

Total: $521

Ex. of print_descriptions() output:

John Doe's Shopping Cart - February 1, 2016

Item Descriptions
Nike Romaleos: Volt color, Weightlifting shoes Chocolate Chips: Semi-sweet
Powerbeats 2 Headphones: Bluetooth headphones

1

(2) In the main section of your code, prompt the user for a customer's name and today's date. Output the name and date. Create an object of type ShoppingCart. (1 pt) Ex. Enter the customer's name: John Doe Enter today's date: February 1, 2016 Customer name: John Doe Today's date: February 1, 2016 (3) Implement the print_menu() function. print_menu() has a ShoppingCart parameter and outputs a menu of options to manipulate the shopping cart. Each option is represented by a single character. Build and output the menu within the function.

If an invalid character is entered, continue to prompt for a valid choice. Hint: Implement Quit before implementing other options. Call print_menu() in the main() function. Continue to execute the menu until the user enters q to Quit. (2 pts) -Hint: this is the same type of menu that we have done for a few different labs now ;-) Ex: MENU a - Add item to cart i - Output items' descriptions o - Output shopping cart q - Quit Choose the option: (4) Implement Output shopping cart menu option. (1 pts) Ex: OUTPUT SHOPPING CART John Doe's Shopping Cart - February 1, 2016 Number of Items: 8 Nike Romaleos 2 @ $189 = $378 Chocolate Chips 5 @ $3 = $15 Powerbeats 2 Headphones 1 @ $128 = $128 Total: $521 (5) Implement Output item's description menu option. (1 pts) Ex.

OUTPUT ITEMS' DESCRIPTIONS John Doe's Shopping Cart - February 1, 2016 Item Descriptions Nike Romaleos: Volt color, Weightlifting shoes Chocolate Chips: Semi-sweet Powerbeats 2 Headphones: Bluetooth headphones

2

(6) Implement Add item to cart menu option. (2 pts)

Ex:

ADD ITEM TO CART
Enter the item name:
Nike Romaleos
Enter the item description:
Volt color, Weightlifting shoes
Enter the item price:
189
Enter the item quantity:
2

Answer 1

Code to Copy:

#class item to store the details of an item
class Item:
   #constructor
   def __init__(self, name, description, price, quantity):
       #initialize all the values
       self.name = name
       self.description = description
       self.price = price
       self.quantity = quantity
class ShoppingCart:
   #constructor
   def __init__(self, name, data):
       #initialize name and date to given values
       self.name = name
       self.date = date
       #set the items to empty list
       self.items = []
       #set the number of items to 0
       self.num_items = 0
   #method to add an item to shopping cart
   def add_item(self, itemToPurchase):
       #append the item to the list
       self.items.append(itemToPurchase)
       #add the item quantity to number of items
       self.num_items += itemToPurchase.quantity
   #method to print the descriptions
   def print_descriptions(self):
       #if there are no items in the shopping cart
       if(len(self.items) == 0):
           print("SHOPPING CART IS EMPTY")
       else:
           print("Item Descrptions")
           print(self.name + "'s Shopping Cart - " + self.date)
           #iterate over the items
           for i in self.items:
               #print item name and description
               print(i.name + ": " + i.description)
   #method to print the details of items
   def print_total(self):
       #if there are no items in shopping cart
       if(len(self.items) == 0):
           print("SHOPPING CART IS EMPTY")
       else:
           print(self.name + "'s Shopping Cart - " + self.date)
           print("Number of items: " + str(self.num_items))
           total = 0
           #iterate over the items
           for i in self.items:
               #print the details of items
               print(i.name + " " + str(i.quantity) + " @ $" + str(i.quantity * i.price))
               #calculate the price and add it to total
               total += (i.quantity * i.price)
           #print total price
           print("total : $" + str(total))
#method to print the menu
def print_menu():
   print("Main")
   print("a - Add item to cart")
   print("i - Output items descriptions")
   print("o - Output shopping cart")
   print("q. quit")
if __name__ == "__main__":
   #prompt the user for name
   name = input("Enter customer name:\n")
   #prompt the user for date
   date = input("Enter today's date:\n")
   #Print name and date
   print("Customer name: " + name)
   print("Today's date: " + date)
   #create shopping cart object
   s = ShoppingCart(name, date)
   while True:
       #print the menu
       print_menu()
       #prompt the user to enter an option
       ch = input("Enter your choice: ")
       if(ch == 'a'):
           #prompt the user for item details
           i_name = input("Enter the item name:\n")
           description = input("Enter the item description:\n")
           price = float(input("Enter the item price:\n"))
           quantity = int(input("Enter the item quantity:\n"))
           #create object for item
           item = Item(i_name, description, price, quantity)
           #call the method to add the item ot shopping cart
           s.add_item(item)
       elif(ch == 'i'):
           #call the method to print the descriptions
           s.print_descriptions()
       elif(ch == 'o'):
           #call the method to print the details
           s.print_total()
       elif(ch == 'q'):
           print("Thank you for using the shopping cart")
           #break the loop
           break
       else:
           print("Invalid choice, please try again")
          
Code Images:

Output Images:

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