如何將具有公共鍵值對的字典列表轉換為以鍵為公共值的新字典？

Question

我有這個列表有多個字典，但每個字典都有一個公共鍵，我想通過它創建一個新的字典，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"} ]

這是期望的結果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並創建 output 字典

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