CODEWITHSUNDEEP
pythonlistlinker
St Tebb
St Tebb

Reputation: 69

How to link input data to list items

Writing a Python program - scenario is Chinese restaurant, orders are input with integers which correspond to menu items and prices. Can't work out how to link the input numbers to the corresponding menu item and price. Have two lists, one for menu and one for price. User inputs 1 if they want rice, etc. Want to show an order summary which shows the menu item and the price and creates a total for the whole order.

Looked in Python books but can't find how to solve my problem

menu = ['rice', 'egg fried rice', 'prawn crackers']
price = [1.00, 2.00, 1.50]
again = True

while again:


    incorrect_menu_item = True

    while incorrect_menu_item:
        menu_item = int(input('Enter menu item: '))

        if menu_item >=1 and menu_item <= len (menu):
            incorrect_menu_item = False
            print('menu item accepted')
            new_order.append(menu_item)
            new_order.sort()

        else:
            print('incorrect input')

    another_item = input('Another item? n to stop, enter to continue: ')
    if another_item == 'n':
            again = False
            print('Thank you, order is complete')

Have tried to link the input number to the index of the menu and price lists but it is not working

Upvotes: 1

Views: 258

Answers (1)

Peter Warrington
Peter Warrington

Reputation: 694

A way you could do this is using an array of dictionaries, a set of key value pairs. It could look a bit like this:

menu = [
    {
        "index": 59,
        "name": "Plain rice",
        "price": 1.2
    },
    {
        "index": 33,
        "name": "Something else",
        "price": 2.5
    }
]

You could then query this like so:

for i, item in enumerate(menu):
    if item["index"] == menu_item:
        # Do something with the correct item
        # e.g: item["price"] to get the price

Upvotes: 1

Related Questions