python - 查找字典列表的总和

Question

我有一个包含很多字典的列表，看起来像这样(我只插入了前两个):

[
    {
        "_id": "60ca15162a42482a5fc83bcc",
        "name": "Fanta",
        "category": "Soft Drinks",
        "description": "Fresh Drink",
        "price": 14,
        "quantity": 104
    },
    {
        "_id": "60ca15162a42482a5fc83bcc",
        "name": "Fanta",
        "category": "Soft Drinks",
        "description": "Fresh Drink",
        "price": 16,
        "quantity": 104
    } ]

我想得到总价。总价看起来是这样的。

total=(14*104)+(16*104)

当列表中有很多这样的词典时，我该怎么做？有什么想法吗？

Answer 1

你可以使用 sum() :

lst = [
    {
        "_id": "60ca15162a42482a5fc83bcc",
        "name": "Fanta",
        "category": "Soft Drinks",
        "description": "Fresh Drink",
        "price": 14,
        "quantity": 104,
    },
    {
        "_id": "60ca15162a42482a5fc83bcc",
        "name": "Fanta",
        "category": "Soft Drinks",
        "description": "Fresh Drink",
        "price": 16,
        "quantity": 104,
    },
]

total = sum(d["price"] * d["quantity"] for d in lst)
print(total)

打印:

3120

---

编辑:创建总计列表:

total = [d["price"] * d["quantity"] for d in lst]
print(total)

打印:

[1456, 1664]