Question

please solve by utilizing python

Define a function named checkOut which takes two JSON strings, each representing a dictionary.
The first has the following structure,

{ "customer" : name , "cart" : [ item1, item2, ... ] }

The second has the following structure,
{ item1 : price1, item2 : price2, ... }

The function must return a JSON string representing the following dictionary:

{ "customer" : name, "amount_due" : x }

where x is the sum of the prices of the items in the customer's cart.

Example:
checkOut('{"customer":"Sally", "cart":["milk","cookies"]}','{"milk":1.79,"cookies":3.99}') must return '{"customer":"Sally", "amount_due":5.78}'

Answer 1

import json


def checkOut(items_json, price_json):

    # Parses JSON string to python dictionary
    items_dictionary = json.loads(items_json)
    price_dictionary = json.loads(price_json)

    amount_due = 0

    # Iterating through the cart of items
    for item in items_dictionary.get("cart"):
        # If price of the item is mentioned
        if item in price_dictionary:
            amount_due += price_dictionary[item]

    # Output dictionary
    output_dictionary = {"customer": items_dictionary["customer"], "amount_due": amount_due}
    # Converting Python dictionary to JSON String
    output_json_string = json.dumps(output_dictionary)

    return output_json_string


# Driver code
if __name__ == "__main__":

    # json.dumps converts Python object into a JSON string
    # Converting Python dictionary JSON string
    items_json_string = json.dumps({"customer": "Sally", "cart": ["milk", "cookies"]})
    price_json_string = json.dumps({"milk": 1.79, "cookies": 3.99})

    print(checkOut(items_json_string, price_json_string))