Please answer the following question in Python. I keep getting it wrong after asking it on Chegg so please help me with the print menu function especially because this is where the error is, it should function without a parameter.

This program extends the earlier "Online shopping cart" program. (Consider first saving your earlier program).

(1) Extend the ItemToPurchase class to contain a new attribute. (2 pts)

item_description (string) - Set to "none" in default constructor

Implement the following method for the ItemToPurchase class.

print_item_description() - Prints item_description attribute for an ItemToPurchase object. Has an ItemToPurchase parameter.

Ex. of print_item_description() output:

Bottled Water: Deer Park, 12 oz. 

(2) 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.

Parameterized constructor which takes the customer name and date as parameters (2 pts)

Attributes

customer_name (string) - Initialized in default constructor to "none"

current_date (string) - Initialized in default constructor to "January 1, 2016"

cart_items (list)

Methodsadd_item()

Adds an item to cart_items list. Has a parameter of type ItemToPurchase. Does not return anything.

remove_item()

Removes item from cart_items list. Has a string (an item's name) parameter. Does not return anything.

If item name cannot be found, output this message: Item not found in cart. Nothing removed.

modify_item()

Modifies an item's quantity. Has a parameter of type ItemToPurchase. Does not return anything.

If item can be found (by name) in cart, modify item in cart.

If item cannot be found (by name) in cart, output this message: Item not found in cart. Nothing modified.

get_num_items_in_cart() (2 pts)

Returns quantity of all items in cart. Has no parameters.

get_cost_of_cart() (2 pts)

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

print_total()

Outputs total of objects in cart.

If 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 

(3) In the main section of the 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 customer's name: John Doe Enter today's date: February 1, 2016 Customer name: John Doe Today's date: February 1, 2016 

(4) Implement the print_menu() function to print the following menu of options to manipulate the shopping cart. (1 pt) Ex:

MENU a - Add item to cart r - Remove item from cart c - Change item quantity i - Output items' descriptions o - Output shopping cart q - Quit 

(5) Implement the execute_menu() function that takes 2 parameters: a character representing the user's choice and a shopping cart. execute_menu() performs the menu options described below, according to the user's choice. (1 pt)

(6) In the main section of the code, call print_menu() and prompt for the user's choice of menu options. Each option is represented by a single character.

If an invalid character is entered, continue to prompt for a valid choice. When a valid option is entered, execute the option by calling execute_menu(). Then, print the menu and prompt for a new option. Continue until the user enters 'q'. Hint: Implement Quit before implementing other options. (1 pt) Ex:

a - Add item to cart r - Remove item from cart c - Change item quantity i - Output items' descriptions o - Output shopping cart q - Quit Choose an option: 

(7) Implement Output shopping cart menu option in execute_menu(). (3 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 

(8) Implement Output item's description menu option in execute_menu(). (2 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 

(9) Implement Add item to cart menu option in execute_menu(). (3 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 

(10) Implement remove item menu option in execute_menu(). (4 pts) Ex:

REMOVE ITEM FROM CART Enter name of item to remove: Chocolate Chips 

(11) Implement Change item quantity menu option in execute_menu(). Hint: Make new ItemToPurchase object before using ModifyItem() method. (5 pts) Ex:

CHANGE ITEM QUANTITY Enter the item name: Nike Romaleos Enter the new quantity: 3

Error Code

class ItemToPurchase: total_cost = 0 def __init__(self,item_name = 'none', item_price = 0, item_quantity = 0, item_description = 'none'): self.item_name = item_name self.item_price = item_price self.item_quantity = item_quantity self.item_description = item_description ItemToPurchase.total_cost += item_price * item_quantity def print_item_cost(self): print('%s %d @ $%d = $%d' % (self.item_name, self.item_quantity, self.item_price, (self.item_price * self.item_quantity))) def print_item_description(self): print('%s: %s'%(self.item_name,self.item_description,)) class ShoppingCart: def __init__(self, customer_name = 'none', current_date = 'January 1, 2016', cart_items = []): self.customer_name = customer_name self.current_date = current_date self.cart_items = cart_items def add_item(self,item): self.cart_items.append(item) def remove_item(self): print(' REMOVE ITEM FROM CART') string = input('Enter name of item to remove: ') i = 0 item_removed = False for item in self.cart_items: if(item.item_name == string): del self.cart_items[i] item_removed = True i += 1 if not item_removed: print('Item not found in cart. Nothing removed.') def modify_item(self): print(' CHANGE ITEM QUANTITY') name = input('Enter the item name: ') quantity = int(input('Enter the new quantity: ')) item_removed = False for item in self.cart_items: if(item.item_name == name): item.item_quantity = quantity item_removed = True if not item_removed: print('Item not found in cart. Nothing modified.') def get_num_items_in_cart(self): total = 0 for item in self.cart_items: total += item.item_quantity return total def get_cost_of_cart(self): total = 0 for item in self.cart_items: total += item.item_quantity * item.item_price return total def print_total(): total_cost = get_cost_of_cart() if (total_cost == 0): print('SHOPPING CART IS EMPTY') else: output_cart() def print_descriptions(self): print(' OUTPUT ITEMS\' DESCRIPTIONS') print('{}\'s Shopping Cart - {}'.format(self.customer_name, self.current_date)) print(' Item Descriptions') for item in self.cart_items: print('{}: {}'.format(item.item_name, item.item_description)) def output_cart(self): print('OUTPUT SHOPPING CART') print('{}\'s Shopping Cart - {}'.format(self.customer_name, self.current_date)) total_items = 0 for item in self.cart_items: total_items += item.item_quantity print('Number of Items:', total_items) print() tc = 0 for item in self.cart_items: print('%s %d @ $%d = $%d' % (item.item_name, item.item_quantity, item.item_price, (item.item_quantity * item.item_price)), end=' ') tc += (item.item_quantity * item.item_price) if len(self.cart_items) == 0: print('SHOPPING CART IS EMPTY') print(' Total: $%d' % (tc))

def print_menu(ShoppingCart): customer_Cart = newCart menu = (' MENU ' 'a - Add item to cart ' 'r - Remove item from cart ' 'c - Change item quantity ' 'i - Output items\' descriptions ' 'o - Output shopping cart ' 'q - Quit ') command = '' while(command != 'q'): string='' print(menu) command = input('Choose an option: ') while(command != 'a' and command != 'o' and command != 'i' and command != 'r' and command != 'c' and command != 'q'): command = input('Choose an option: ') if(command == 'a'): print(' ADD ITEM TO CART') item_name = input('Enter the item name: ') item_description = input('Enter the item description: ') item_price = float(input('Enter the item price: ')) item_quantity = int(input('Enter the item quantity: ')) customer_Cart.add_item(ItemToPurchase(item_name, item_price, item_quantity, item_description)) if(command == 'o'): customer_Cart.output_cart() if(command == 'i'): customer_Cart.print_descriptions() if(command == 'r'): customer_Cart.remove_item() if(command == 'c'): customer_Cart.modify_item() def execute_menu(choice, cart): if choice == "a": print("ADD ITEM TO CART") item_name = input("Enter the item name: ") item_description = input("Enter the item description: ") item_price = float(input("Enter the item price: ")) item_quantity = int(input("Enter the item quantity: ")) cart.add_item(ItemToPurchase(item_name, item_price, item_quantity, item_description)) elif choice == "r": print("REMOVE ITEM FROM CART") item_name = input("Enter name of item to remove: ") cart.remove_item(item_name) elif choice == "c": print("CHANGE ITEM QUANTITY") item_name = input("Enter the item name: ") if __name__ == "__main__": # Type main section of code here customer_name = str(input('Enter customer\'s name: ')) current_date = str(input('Enter today\'s date: ')) print(' Customer name:', customer_name) print('Today\'s date:', current_date) newCart = ShoppingCart(customer_name, current_date) print_menu(newCart)