字典中的多个值python [英] multiple values in a dictionary python
问题描述
我有以下格式的数据(保存在列表中)
I have data in following form (saved in a list)
id, price, date, category
现在,我基本上是要根据类别分开项目。
基本上是一个字典,其中key是类别和其余的东西(id,price,data)是它的值
我已经创建了一个数据结构,所以让datastructre'item'具有上述四个属性(id,price,date,category)
所以基本上我想要的是以下格式的字典:
Now, I basically want to seperate items based on the category.. basically a dictionary where key is the category and rest of the stuff (id, price, data) are its values I have already created a datastructure so lets a datastructre 'item' has the above four stated attributes (id, price, date, category) So basically what i want is a dictionary in following form:
{1: [item_1,item_2....], 2:[item....]}
我该怎么办..
由于单个键中有许多值,所以我知道它将使用defaultdict ..但是我仍然无法解决这个问题。
谢谢
how do i do this.. Since there are many values in a single key hence i know that it will use defaultdict.. but still I am not able to get around this. Thanks
推荐答案
我想你想要这样的东西,假设你的当前数据存储在列表 list_data
:
I think you want something like this, assuming your current data is stored in the list list_data
:
dict_data = defaultdict(list)
for item in list_data:
dict_data[item.category].append(item)
如果每个项目都是元组而不是一个对象,使用 item [3]
而不是 item.category
。
If each item is a tuple instead of an object, use item[3]
instead of item.category
.
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