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Question

当你有一个包含多个JSON对象的JSON响应时，如何使用Python在JSON中提取特定对象？

例如，通过以下JSON响应，我有三个对象。

{
"_links": {
    "base": "REDACTED", 
    "context": "", 
    "self": "REDACTED"
}, 
"limit": 20, 
"results": [
    {
        "_expandable": {
            "ancestors": "", 
            "body": "", 
            "children": "", 
            "container": "", 
            "descendants": "", 
            "extensions": "", 
            "history": "/rest/api/content/198121503/history", 
            "metadata": "", 
            "operations": "", 
            "space": "/rest/api/space/ReleaseNotes", 
            "version": ""
        }, 
        "_links": {
            "self": "REDACTED", 
            "tinyui": "/x/HxjPCw", 
            "webui": "UNIQUE_URL_HERE"
        }, 
        "id": "198121503", 
        "status": "current", 
        "title": "Unique Title of Content", 
        "type": "page"
    }, 
    {
        "_expandable": {
            "ancestors": "", 
            "body": "", 
            "children": "", 
            "container": "", 
            "descendants": "", 
            "extensions": "", 
            "history": "/rest/api/content/197195923/history", 
            "metadata": "", 
            "operations": "", 
            "space": "/rest/api/space/ReleaseNotes", 
            "version": ""
        }, 
        "_links": {
            "self": "REDACTED", 
            "tinyui": "/x/k-jACw", 
            "webui": "UNIQUE_URL_HERE"
        }, 
        "id": "197195923", 
        "status": "current", 
        "title": "Unique Title of Content", 
        "type": "page"
    }, 
    {
        "_expandable": {
            "ancestors": "", 
            "body": "", 
            "children": "", 
            "container": "", 
            "descendants": "", 
            "extensions": "", 
            "history": "/rest/api/content/198121203/history", 
            "metadata": "", 
            "operations": "", 
            "space": "/rest/api/space/ReleaseNotes", 
            "version": ""
        }, 
        "_links": {
            "self": "REDACTED", 
            "tinyui": "/x/8xbPCw", 
            "webui": "UNIQUE_URL_HERE"
        }, 
        "id": "198121203", 
        "status": "current", 
        "title": "Unique Title of Content", 
        "type": "page"
    } 
], 
"size": 3, 
"start": 0

}

如何检索响应中特定对象的ID和TITLE？

我在其他帖子中读到，当你使用json.loads(your_json)时，它就变成了一本字典。如果是这种情况，如果将这些数据存储为字典，如何提取这些数据？

更新

让我澄清一下，因为我可能没有清楚地看到或解释这一点。

循环通过一切是唯一的选择吗？有没有选择说让我获得第二个JSON对象并返回ID和标题？如果是这样的话，为什么我不应该创建一个自定义对象，将我想要的项目从每个JSON对象存储到一个数组中，然后我可以访问数组中的每个对象？

Answer 1

将响应转换为json后，您可以使用关键属性。

for result in data['results']:
    print("id: {}, title: {}".format(result['id'], result['title']))

正如您所提到的，您可以使用json.load将字符串转换为字典。但是如果你正在使用requests库，只需使用response.json来获取所需格式的数据。

Answer 2

在将字符串加载到json对象后，使用括号表示法来访问键。循环遍历结果键，直到找到所需的对象，如下所示：

j = json.loads(your_json)

for r in j["results"]:
    if r["title"] == "Something":
        print(r["id"])
        print(r["title"])

从Python中的响应中读取特定的JSON对象

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2 个答案: