查找字典列表的总和
我有一个列表，其中包含许多看起来像这样的字典（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字典时，我该怎么做？有什么想法吗？
回答
您可以使用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)
印刷：
3120
3120
编辑：要创建一个带有总计的列表：
印刷：
total = [d["price"] * d["quantity"] for d in lst]
print(total)