访问python JSON中的嵌套项

Question

我正在加载具有以下结构的 JSON 文件：

{"questions": 
     [{"question_id": 0, "image_filename": "CLEVR_val_009641.png", "question": "Are there any tiny green things made of the same material as the small brown sphere?"}, 
     {"question_id": 1, "image_filename": "CLEVR_val_010849.png", "question": "Are there any purple metal things of the same size as the green shiny object?"}, 
     {"question_id": 2, "image_filename": "CLEVR_val_004213.png", "question": "Is there a big thing of the same color as the big metal ball?"}, 
     {"question_id": 3, "image_filename": "CLEVR_val_012597.png", "question": "There is a big metallic thing to the right of the blue rubber object; are there any small cyan rubber blocks that are to the right of it?"}, 
     {"question_id": 4, "image_filename": "CLEVR_val_006304.png", "question": "Is there any other thing that has the same material as the small brown object?"}
     ]
}

我正在使用json.loads()加载文件。

到目前为止，使用：

train_data_jsonload = json.load(f)
train_data = train_data_jsonload.get("questions")

我已经能够加载整个“数据集”。

我只想在我的 json 文件中加载question键（所以所有问题，没有question_id和image_filename ）

我尝试使用train_data.get("question")但我得到错误list object has no attribute 'get'

我也尝试使用这里建议的内容： 嵌套字典没有任何成功

那么，回到我的问题，我如何只选择question字段？

Answer 1

尝试这个：

train_data_jsonload = json.load(f)
for questions_info in train_data_jsonload["questions"]:
   question  = question_info["question"]
   #Do required stuff here if needed.

Answer 2

如果您希望将问题列表作为输出，只需使用列表理解：

text_questions = [item["question"] for item in train_data_jsonload.get("questions")]

Answer 3

最后我找到了解决方案：

for element in train_data:
    print(element.get("question"))

将打印每个问题。