python_shopping_cart.py

class ItemToPurchase:
    item_name = ''
    item_price = int(0)
    item_quantity = int(0)
    item_description = ''
    
    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,self.item_quantity,'@ $', end='')
        print(int(self.item_price),'= $', end='')
        print((self.item_quantity*int(self.item_price)))
       
    def print_item_description(self):
        print(self.item_name,end='')
        print(':',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()
        print("REMOVE ITEM FROM CART")
        st = input("Enter name of item to remove:"'\n')
        n = 0
        for i in self.cart_items:
            if(i.item_name == st):
                del self.cart_items[n]
                n+=1
                yes = True
                break
            else:
                yes=False
        if(yes==False):
            print("Item not found in cart. Nothing removed.")
            
    def modify_item(self):
        print('CHANGE ITEM QUANTITY')
        name = input("Enter the item name:"'\n')
        for i in self.cart_items:
            if(i.item_name == name):
                quant = int(input("Enter the new quantity:"'\n'))
                i.item_quantity = quant
                yes = True
                break
            else:
                yes = False
        if(yes==False):
            print("Item not found in cart. Nothing modified.")
    
    def get_num_items_in_cart(self):
        numrep = 0
        for i in self.cart_items:
            numrep += i.item_quantity
        return numrep
        
    def get_cost_of_cart(self):
        tc = int(0)
        cost = int(0)
        for i in self.cart_items:
            cost = int((i.item_price*i.item_quantity))
            tc = tc + cost
        return tc
        
    def print_total():
        tc = self.get_cost_of_cart()
        if tc == 0:
            print("shopping cart is empty")
        else:
            output_cart()
            
    def print_descriptions(self):
        print('Output item descriptions')
        print(self.customer_name,end='')
        print("\'s", end = '')
        print(' Shopping cart - ', end = '')
        print(self.current_date)
        print('Item Dscriptions')
        for i in self.cart_items:
            print(i.item_name,end='')
            print(': ', end = '')
            print(i.item_description)
            
    def output_cart(self):
        ne = ShoppingCart()
        print('OUTPUT SHOPPING CART')

        print(self.customer_name,end='')
        print("\'s Shopping Cart - ",end ='')
        print(self.current_date)
        print('Number of Items:', ne.get_num_items_in_cart())
        print()
        self.total_cost = self.get_cost_of_cart()
        if self.total_cost ==0:
            print("SHOPPING CART IS EMPTY")
        
        tc = 0
        for i in self.cart_items:
            print('{} {} @ ${} = ${}'.format(i.item_name, i.item_quantity, i.item_price, (i.item_price*i.item_quantity)))
            tc +=(i.item_quantity * i.item_price)
        print('\nTotal: ${}'.format(tc),end='\n')
        
def print_menu(new_cart):
    customer_Cart = newCart
    st = ''
    comm = ''
    
    while comm!='q':
        
        print('\nMENU\n'
        'a - Add item to cart\n'
        'r - Remove item from cart\n'
        'c - Change item quantity\n'
        'i - Output items\' descriptions\n'
        'o - Output shopping cart\n'
        'q - Quit\n', end='\n')
        comm = input('Choose an option:')
        print()
        if(comm == 'a'):
            print("ADD ITEM TO CART")
            item_name = input('Enter the item name:')
            print()
            item_description = input('Enter the item description:')
            print()
            item_price = int(input("Enter the item price:"))
            print()
            item_quantity = int(input("Enter the item quantity:"))
            print()
            customer_Cart.add_item(ItemToPurchase(item_name,item_price,item_quantity,item_description))
        elif(comm == 'o'):
            customer_Cart.output_cart()
        elif(comm == 'i'):
            customer_Cart.print_descriptions()
        elif(comm == 'r'):
            customer_Cart.remove_item()
        elif(comm=='c'):
            customer_Cart.modify_item()
        elif(comm != 'a' and comm != 'o' and comm != 'i' and comm != 'r' and comm != 'c' and comm != 'q'):
            while(comm != 'a' and comm != 'o' and comm != 'i' and comm != 'r' and comm != 'c' and comm != 'q'):
                comm = input("Choose an option:\n")

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