如何在python中从JSON中获取一个键和值？

当我在django中点击API URL时，我得到了一个数据作为响应。我想从该数据中获取content_id，以检查它是否已经存在。如何迭代JSON以找到特定的键及其值

r.json() =   

  {
        "code": 200,
        "status": "OK",
        "data": [
            {
                "cart_id": "36",
                "content": [
                    {
                        "price": "100",
                        "price_id": "1",
                        "code": "USD",
                        "symbol": "$",
                        "name": "Carol of the Bells SATB - arr. Jay Rouse",
                        "content_id": "17408"
                    }
                ],
                "poster_url": "http://devstudio.cnedocent.com/img/No-Image-Vertical.png"
            }
        ],
        "msg": "Contents Found!"
    }

---

我尝试了

r.json（）['data'][0]['content'][0]

，但它只在中的一个数据中工作，如果有多个数据，那么当我尝试使用for循环迭代内容id时，它就不起作用了

使用python，将json转换为字典并以这种方式进行迭代非常容易

---

使用python，将json转换为字典并以这种方式进行迭代非常容易

---

也许像这样的事情会有所帮助。在您发布的代码中，第一行与我之前看到的有点不同。也许json.loads将帮助您获取内容中n个对象的“content_id”

import json

data = json.loads('''{
        "code": 200,
        "status": "OK",
        "data": [
            {
                "cart_id": "36",
                "content": [
                    {
                        "price": "100",
                        "price_id": "1",
                        "code": "USD",
                        "symbol": "$",
                        "name": "Carol of the Bells SATB - arr. Jay Rouse",
                        "content_id": "17408"
                    },
                    {
                        "price": "100",
                        "price_id": "1",
                        "code": "USD",
                        "symbol": "$",
                        "name": "Carol of the Bells SATB - arr. Jay Rouse",
                        "content_id": "999834"
                    }
                ],
                "poster_url": "http://devstudio.cnedocent.com/img/No-Image-Vertical.png"
            },
            {
                "cart_id": "36",
                "content": [
                    {
                        "price": "100",
                        "price_id": "1",
                        "code": "USD",
                        "symbol": "$",
                        "name": "Carol of the Bells SATB - arr. Jay Rouse",
                        "content_id": "34523"
                    },
                    {
                        "price": "100",
                        "price_id": "1",
                        "code": "USD",
                        "symbol": "$",
                        "name": "Carol of the Bells SATB - arr. Jay Rouse",
                        "content_id": "6423412"
                    }
                ],
                "poster_url": "http://devstudio.cnedocent.com/img/No-Image-Vertical.png"
            }
        ],
        "msg": "Contents Found!"
    }''')

for current_data in data["data"]:
    for current_content in current_data["content"]:
        # here I am printing, I imagine you will do something different
        # with the content_id.
        print(current_content["content_id"])

---

也许像这样的事情会有帮助。在您发布的代码中，第一行与我之前看到的有点不同。也许json.loads将帮助您获取内容中n个对象的“content_id”

import json

data = json.loads('''{
        "code": 200,
        "status": "OK",
        "data": [
            {
                "cart_id": "36",
                "content": [
                    {
                        "price": "100",
                        "price_id": "1",
                        "code": "USD",
                        "symbol": "$",
                        "name": "Carol of the Bells SATB - arr. Jay Rouse",
                        "content_id": "17408"
                    },
                    {
                        "price": "100",
                        "price_id": "1",
                        "code": "USD",
                        "symbol": "$",
                        "name": "Carol of the Bells SATB - arr. Jay Rouse",
                        "content_id": "999834"
                    }
                ],
                "poster_url": "http://devstudio.cnedocent.com/img/No-Image-Vertical.png"
            },
            {
                "cart_id": "36",
                "content": [
                    {
                        "price": "100",
                        "price_id": "1",
                        "code": "USD",
                        "symbol": "$",
                        "name": "Carol of the Bells SATB - arr. Jay Rouse",
                        "content_id": "34523"
                    },
                    {
                        "price": "100",
                        "price_id": "1",
                        "code": "USD",
                        "symbol": "$",
                        "name": "Carol of the Bells SATB - arr. Jay Rouse",
                        "content_id": "6423412"
                    }
                ],
                "poster_url": "http://devstudio.cnedocent.com/img/No-Image-Vertical.png"
            }
        ],
        "msg": "Contents Found!"
    }''')

for current_data in data["data"]:
    for current_content in current_data["content"]:
        # here I am printing, I imagine you will do something different
        # with the content_id.
        print(current_content["content_id"])

一般访问

with open('vash.json') as f:
    data = json.load(f)

data['data'][0]['content'][0]['content_id'])

反复

for i in data['data']:
    for j in i['content']:
        print(j['content_id'])

奖金

一般访问

with open('vash.json') as f:
    data = json.load(f)

data['data'][0]['content'][0]['content_id'])

反复

for i in data['data']:
    for j in i['content']:
        print(j['content_id'])

奖金

---

到目前为止你都试了些什么？@KlausD。我更新了问题。你要给我们看不起作用的代码吗？@KlausD。这是一个顶部有

r.json（）

的有效json文件吗？我很熟悉json的导航，但从未见过它有这个顶部line@vash_the_stampede上面的作业是垃圾。我猜他想表达的是，如果给他打电话，这就是结果。到目前为止你试过什么？@KlausD。我更新了问题。你要给我们看不起作用的代码吗？@KlausD。这是一个顶部有

r.json（）

的有效json文件吗？我很熟悉json的导航，但从未见过它有这个顶部line@vash_the_stampede上面的作业是垃圾。我猜他想表达的是，如果给定的调用，这就是结果。