本文介绍了使用字典计算购物清单的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
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]）
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