如何将具有公共键值对的字典列表转换为以键为公共值的新字典？

Question

我有这个列表有多个字典，但每个字典都有一个公共键，我想通过它创建一个新的字典，如下所示list = [{"local_id":1,"id":29,"name":"Ashish"},{"local_id":2,"id":29,"name":"Boora"},{"local_id":3,"id":30,"name":"Harshdeep"},{"local_id":4,"id":30,"name":"Singh"},{"local_id":5,"id":31,"name":"Deepak"} ]

这是期望的结果dictionry = { 29:{'details':[{"local_id":1,"id":29,"name":"Ashish"},{"local_id":2,"id":29,"name":"Boora"}]}, 30:{'details':[{"local_id":3,"id":30,"name":"Harshdeep"},{"local_id":4,"id":30,"name":"Singh"}]}, 31:{'details':[{"local_id":5,"id":31,"name":"Deepak"}]} }

Answer 1

使用setdefault并创建 output 字典

result = {}
for item in list:
    result.setdefault(item["id"], {}).setdefault("details", []).append(item)
print(result)