燒瓶JSON響應最後一個元素

Question

比方說，我有JSON文件如下：

{ 
    "task": [ 
    { 
     "description": "Milk, Cheese, Pizza, Fruit, Tylenol", 
     "done": False, 
     "id": 1, 
     "title": "Buy groceries" 
    }, 
    { 
     "description": "Need to find a good Python tutorial on the web", 
     "done": False, 
     "id": 2, 
     "title": "Learn Python" 
    } 
    ] 
} 

我想知道如何能夠在JSON響應訪問的最後一個元素。我曾嘗試下面的代碼遞增，但沒有奏效：

id': request.json['task'][-1]['id'] + 1 

Answer 1

如果你想同時增加id S，你可以這樣做：

d = { 
    "task": [ 
    { 
     "description": "Milk, Cheese, Pizza, Fruit, Tylenol", 
     "done": False, 
     "id": 1, 
     "title": "Buy groceries" 
    }, 
    { 
    "description": "Need to find a good Python tutorial on the web", 
    "done": False, 
    "id": 2, 
    "title": "Learn Python" 
    } 
] 
} 
new_d = {"task":[{a:b+1 if a == "id" else b for a, b in i.items()} for i in d['task']]} 

輸出：

{'task': [{'id': 2, 'done': False, 'description': 'Milk, Cheese, Pizza, Fruit, Tylenol', 'title': 'Buy groceries'}, {'id': 3, 'done': False, 'description': 'Need to find a good Python tutorial on the web', 'title': 'Learn Python'}]} 

如果您想增加存在於列表中最後一個字典中的id：

d['task'][-1]['id'] += 1