class ItemToPurchase: 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

def print_item_cost(self): print(self.item_name + " " + str(self.item_quantity) + " @ $" + str(self.item_price) + " = $" + str(self.item_price * self.item_quantity))

def print_item_description(self): print(self.item_name + ": " + str(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, ItemToPurchase): self.cart_items.append(ItemToPurchase)

def remove_item(self, itemName):

RemoveIt = False

for item in self.cart_items: if item.item_name == itemName: self.cart_items.remove(item) RemoveIt = True break if not RemoveIt: print('Item not found in cart. Nothing removed.')

def modify_item(self, itemToPurchase):

ModifyIt = False

for i in range(len(self.cart_items)):

if self.cart_items[i].item_name == itemToPurchase.item_name: ModifyIt = True

if (itemToPurchase.item_price == 0 and itemToPurchase.item_quantity == 0 and itemToPurchase.item_description == 'none'): break else: if (itemToPurchase.item_price != 0): self.cart_items[i].item_price = itemToPurchase.item_price if (itemToPurchase.item_quantity != 0): self.cart_items[i].item_quantity = itemToPurchase.item_quantity if (itemToPurchase.item_description != 'none'): self.cart_items[i].item_description = itemToPurchase.item_description

break if not ModifyIt: print('Item not found in cart. Nothing modified.')

def get_num_items_in_cart(self): num_items = 0 for item in self.cart_items: num_items = num_items + item.item_quantity return num_items

def get_cost_of_cart(self): total_cost = 0 cost = 0 for item in self.cart_items: cost = (item.item_quantity * item.item_price) total_cost += cost return total_cost

def print_total(self): total_cost = self.get_cost_of_cart() print('{}\'s Shopping Cart - {}'.format(self.customer_name, self.current_date)) print('Number of Items: %d ' % self.get_num_items_in_cart()) for item in self.cart_items: item.print_item_cost() if (total_cost == 0): print('SHOPPING CART IS EMPTY') print(' Total: $%d' % (total_cost))

def print_descriptions(self): if len(self.cart_items) == 0: print('SHOPPING CART IS EMPTY') else: print('{}\'s Shopping Cart - {}'.format(self.customer_name, self.current_date)) print(' Item Descriptions') for item in self.cart_items: item.print_item_description()

def print_menu(newCart): 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'): print(menu) command = input('Choose an option: ') while (command != 'a' and command != 'o' and command != 'i' and command != 'q' and command != 'r' and command != 'c'): 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 = int(input('Enter the item price: ')) item_quantity = int(input('Enter the item quantity: ')) itemtoPurchase = ItemToPurchase(item_name, item_price, item_quantity, item_description) customer_Cart.add_item(itemtoPurchase)

elif (command == 'o'): print('OUTPUT SHOPPING CART') customer_Cart.print_total()

elif (command == 'i'): print(' OUTPUT ITEMS\' DESCRIPTIONS') customer_Cart.print_descriptions()

elif (command == 'r'): print('REMOVE ITEM FROM CART') itemName = input('Enter name of item to remove: ') customer_Cart.remove_item(itemName)

elif (command == 'c'): print(' CHANGE ITEM QUANTITY') itemName = input('Enter the item name: ') qty = int(input('Enter the new quantity: ')) itemToPurchase = ItemToPurchase(itemName, 0, qty) customer_Cart.modify_item(itemToPurchase) def execute_menu(command, newCart): if command == 'o': newCart.print_total()

if __name__ == "__main__": customer_name = input("Enter customer's name: ") current_date = input("Enter today's date: ") print(" Customer name: %s" % customer_name) print("Today's date: %s" % current_date) newCart = ShoppingCart(customer_name, current_date) print_menu(newCart)

I would like to ask how the first unit is solved in this way. I've tried everything I know to no avail. Does anyone have a way to help me?

Test print_menu(. Should output the menu options. \[ \text { TypeError: print_menu() missing } 1 \text { required positional argument: 'customer_Cart' } \]