使用字典计算购物清单 [英] Computing shopping-list total using dictionaries

问题描述

我尝试调用列表中列出的购物清单的总字典值，但错误已经到来，总和为10.5而不是7.5，它应该列出列表中的项目的总价格，任何列表。

I tried calling the total of dictionary values for a shopping list made in list, but error has been coming up and summing to 10.5 instead of 7.5, it is supposed to give out the total price of items in a list, any list.

stock = {
    "banana": 6,
    "apple": 0,
    "orange": 32,
    "pear": 15
}

prices = {
    "banana": 4,
    "apple": 2,
    "orange": 1.5,
    "pear": 3
}

# Write your code below!

def compute_bill(food):
    total = 0
    for item in food:
        item = shopping_list(prices[key])
        total += item
    return total
shopping_list = ["banana", "orange", "apple"]  

推荐答案

您可以使用列表推导...

You can use list comprehensions ...

sum ] for s in shopping_list]）

这篇关于使用字典计算购物清单的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！