Question

Python

This week you will write a program in Python that mimics an online shopping cart . You will use all the programming techniques we have learned thus far this semester, including if statements, loops, lists and functions. It should include all of the following:

The basics - Add items to a cart until the user says "done" and then print out a list of items in the cart and a total price.

- Ensure the user types in numbers for quantities
- "Hardcode" the price of items into a list and pick from it randomly for each item
- Get the user's name and shipping address
- Separate functions that compute tax and shipping costs and returns their values to the main program

Answer 1

Here is the code :

import random
def store():
    items={"apple":20,"banana":10,"mango":30,"strawberry":40,"lichi":15,"grapes":25,"guava":26}
    return items

def printCart(cart,name,address,tax,shippingCost):  #all details of cart is printed
    total=0.0
    print('----------Your Cart---------')
    for item in cart:
        total=total+item[2]
        print('Item name : {}\nQuantity : {}\nPrice : {}'.format(item[0],item[1],item[2]))
    print('--------')
    print('Name : {}\nAddress : {}\nTax:{}\nShipping Cost : {}'.format(name,address,tax,shippingCost))
    print('\nTotal Price : {}'.format(total+tax+shippingCost)) 

def computeTax(cart):
    tax=0.0;
    for item in cart:
        tax=tax+item[2]*5/100 #5% per item price
    return tax

def genShippingCost(address):
    l=len(address)
    r=random.randint(0,l) #we randomly generate a number by the length of the string address and return a reasonable value as shipping cost
    return r/l*100


def main():
    print("Our Store :")
    print(store()) #The store function defined above contains the item and its price which is called directly inside print function
    print("Enter the item and quantity\nEx:- 'apple 2'\nEnter 'done' to finish\n")
    cart=[]
    while True:
        inp=input()
        if inp=="done": #when user enters done we take the name , address as input and compute tax, shipping cost and finnaly display the cart by calling the print cart function
            print('---------Shipping Details----------\nEnter Name :')
            name=input()
            print('Enter address : ')
            address=input()
            tax=computeTax(cart)
            shippingCost=genShippingCost(address)
            printCart(cart,name,address,tax,shippingCost)
            break #when user enters done and the calculations and printing is over we get out of the loop thus ending the program
        inp=inp.split(' ')
        itemname=inp[0]
        qty=int(inp[1])
        try: #we try fetching the price of the item from the store, if the item is not present in store then an error occurs
            price=store()['{}'.format(itemname)]*qty 
            cart.append([itemname,qty,price])
        except: #if any error occur in the above try block then the below line is executed
            print("The item is not in our store")

main()