Question

develop an automated invoice generator that helps a shop owner to design their invoice. Problem 1 (Defining products and Creating a Menu) Write a program called a2_p1.py that asks a shop owner for product information and creates a menu system that allows customers to purchase multiple products of varying quantities. The program should start by asking the shop owner’s name and company name. Next it should ask for three (3) products and their prices. Finally, it should display a menu.

Answer 1

List are created, first list to store name of products, second list to store price of product, third list to store quantity of product as per customer requirement, fourth list for total price of that product, i.e., price of product * quantity of product.
First loop to store product description, second loop for for product quantity and purchase cost,  in third or final loop total price and total of quantity is done and printing of menu is done.

CODE:

#owner section
ownername = input("Enter Owner's Name:")
companyname = input("Enter Company's Name:")
productname = []
productprice = []
inputline = ""
for i in range(1,4):
print("Enter name of the", i ,"product:", end = '')
x= input()
y= eval(input("Enter price of this product:"))
productname.append(x)
productprice.append(y)

#customer section
quantity = []
output = []
for i in range(0,3):
print("Enter the quantity of", productname[i],":", end='')
quantity.append(eval(input()))
output.append(productprice[i]*quantity[i])

#INVOICE section
print("{:^40}".format("INVOICE"))
print("{:^40}".format(companyname))
print("{:^40}".format(ownername))
print("{:<15}{:^10}{:>15}".format("Product", "Quantity", "Price"))
total=0
qty=0
for i in range(0,3):
print("{:<15}{:^10}{:>15}".format(productname[i], quantity[i], output[i]))
total = total + output[i]
qty= qty + quantity[i]
print("{:<15}{:^10}{:>15}".format("Total:", qty, total))