从一个col'n值分组另一个col'n值

Question

请帮助我，这应该返回插入标准的美元值

''

Answer 1

我认为需要{ "id": 1, "name": "first Quiz", "description": "blabla", "questions": [ { "id": 1010, "name": "my first question", "questionTypeId": 1, "options": [ { "id": 1055, "questionId": 1010, "name": "answer 1", "isAnswer": false }, { "id": 1056, "questionId": 1010, "name": "answer 2", "isAnswer": true }, { "id": 1057, "questionId": 1010, "name": "answer 3", "isAnswer": false }, { "id": 1058, "questionId": 1010, "name": "answer 4", "isAnswer": false } ], "questionType": { "id": 1, "name": "Multiple Choice", "isActive": true } }, ，因为与pandas函数DataFrame.insert的冲突，更好的是使用loc来选择[]的一列：

DataFrame