Question

9.12 Ch 9 Program: The Evil Register Python 3.7

"The ItemToPurchase class

If you haven't done so already, make sure to complete zyLab 9.11 before this one. Otherwise, you will have to implement the ItemToPurchase class from scratch and this zyLab won't make much sense".

ItemToPurchase class from zyLab 9.11 refers to:

(1) Build the ItemToPurchase class with the following specifications:

• Attributes (3 pts)

• item_name (string)

• item_price (int)

• item_quantity (int)

• Default constructor (1 pt)

• Initializes item's name = "none", item's price = 0, item's quantity = 0

• Method

• print_item_cost()

Answer 1

Screenshot

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Program

from datetime import date
#Create a class for items
class Itemtopurchase:
    #Attributes
    item_name="none"
    item_price=0
    item_quantity=0
    #constructor
    def __init__(self,item_name,item_price,item_quantity):
        self.item_name=item_name
        self.item_price=item_price
        self.item_quantity=item_quantity
    #Method to print item details
    def print_item_cost(self):
        print(self.item_name+" "+str(self.item_quantity)+" @ $"+str(self.item_price)+" = $"+str(self.item_price*self.item_quantity))
    #Getters
    def get_item_price(self):
        return self.item_price
    def get_item_quantity(self):
        return self.item_quantity

#Create receipt class
class Receipt:
    #attributes
    customer_name=""
    purchase_date=""
    cart_items=[]
    #constructor
    def __init__(self,customer_name,purchase_date):
        if customer_name=="":
            self.customer_name="Real Human"
        else:
            self.customer_name=customer_name
        if purchase_date=="":
            self.purchase_date=str(date.today())
        else:
            self.purchase_date=purchase_date
    #add items
    def add_item(self,item):
        self.cart_items.append(item)
    #Print details
    def print_receipt(self,isevil):
        total=0
        if isevil==True:
            self.cart_items=sorted(self.cart_items, key=lambda cart:(cart.get_item_quantity()*cart.get_item_price()))
            print("Welcome to EvilMart, "+self.customer_name)
            print(self.purchase_date)
            print("Have an EVIL day!")
          
        else:
            self.cart_items=sorted(self.cart_items, key=lambda cart:(cart.get_item_quantity()*cart.get_item_price()),reverse=True)
            print("Welcome to GoodCo, "+self.customer_name)
            print(self.purchase_date)
            print("Have an GOOD day!")
          
        for x in self.cart_items:
                x.print_item_cost()
                total+=x.get_item_price()*x.get_item_quantity()
        print("Total: $"+str(total))

#Main method
def main():
    #Promt for customer name and date
    customer_name=input("Enter Customer Name:\n")
    purchase_date=input("Enter Today's Date: \n")
    #Evil prompt
    isEvil=input("Are you evil?\n")
    isEvil=isEvil.upper()
    evilCheck=False
    if("YEAH" in isEvil or "YES" in isEvil or "YUP" in isEvil):
        evilCheck=True
        #Receipt object
    receipt=Receipt(customer_name,purchase_date)
    #Loop unti user stop purchase
    while True:
        item_name=input("Enter the item name: \n")
        if item_name!="":
            item_price=int(input("Enter the item price: \n"))
            item_quantity=int(input("enter the item quantity: \n"))
            receipt.add_item(Itemtopurchase(item_name,item_price,item_quantity))
        else:
          print()
          receipt.print_receipt(evilCheck)
          break
#star
main()

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output

Enter Customer Name:
Nate
Enter Today's Date:

Are you evil?
bwahahah yes
Enter the item name:
Bottles Children Tears
Enter the item price:
2
enter the item quantity:
299
Enter the item name:
Salt
Enter the item price:
2
enter the item quantity:
1
Enter the item name:

Welcome to EvilMart, Nate
2019-06-02
Have an EVIL day!
Salt 1 @ $2 = $2
Bottles Children Tears 299 @ $2 = $598
Total: $600

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Program Screenshot