使用 python 从 CURL 输出中解析 JSON

Question

I am trying to get value of id ie "id": 59 which is in the curl output in form of json. Below is the curl output in json:

[{"id":59,"description":"This is a demo project","name":"Demo_Project","name_with_namespace":"sam / Demo_Project","path":"demo_project","path_with_namespace":"sam/demo_project","created_at":"2020-03-02T08:43:13.664Z","default_branch":"master","tag_list":[],"ssh_url_to_repo":"ssh://git@od-test.od.com:2222/sam/demo_project.git","http_url_to_repo":"https://od-test.od.com/gitlab/sam/demo_project.git","web_url":"https://od-test.od.com/gitlab/sam/demo_project","readme_url":"https://od-test.od.com/gitlab/sam/demo_project/blob/master/README.md","avatar_url":null,"star_count":0,"forks_count":0,"last_activity_at":"2020-04-09T09:28:09.860Z","namespace":{"id":2259,"name":"sam","path":"sam","kind":"user","full_path":"sam","parent_id":null,"avatar_url":"https://secure.gravatar.com/avatar/755db8ssqaq50dcc9d189c53523b?s=80\u0026d=identicon","web_url":"https://od-test.od.com/gitlab/sam"}}]

I am using python to parse the json and get the value of id. I have tried the following command to do the same but got an error.

curl --header "PRIVATE-TOKEN: 9999ayayayar66" "https://od-test.od.com/gitlab/api/v4/search?scope=projects&search=demo_project" | python -c 'import sys, json; print(json.load(sys.stdin)["id"])'

Error:

Can anyone help me the correct python command to get the value of id. Thanks in advance.

Answer 1

The JSON contains an array of objects but you are treating it like it is a single object:

import sys, json; print(json.load(sys.stdin)["id"])

You're basically saying "here is a collection of objects, give me the ID of the object" . It doesn't make sense.

If you assume you only ever want the ID of the first object in the array, you can use this:

import sys, json; print(json.load(sys.stdin)[0]["id"])

Answer 2

JSON 对象的根实际上是一个数组，因此您应该先从中取出第一项：

curl --header "PRIVATE-TOKEN: 9999ayayayar66" "https://od-test.od.com/gitlab/api/v4/search?scope=projects&search=demo_project" | python -c 'import sys, json; print(json.load(sys.stdin)[0]["id"])'

Answer 3

您必须编写print(json.load(sys.stdin)[0]["id"])因为 json 响应是字典列表，而不是字典。

Answer 4

Since you also tagged Python Requests , your CURL command could be translated to:

import requests

headers = {
    'PRIVATE-TOKEN': '9999ayayayar66',
}

params = (
    ('scope', 'projects'),
    ('search', 'demo_project'),
)

response = requests.get('https://od-test.od.com/gitlab/api/v4/search', headers=headers, params=params)

Then you can get the id value from the JSON Response Content with response.json()[0]["id"] . This uses the built-in JSON decoder to convert the JSON response to a list of dictionaries.