Delete key and pair from Json file-CodePudding

I'm trying to delete a key and its pair from a json file . I tried the codes below but nothing triggers or work. Anyone can modify and assist me

reda.json file

[{"carl": 33}, {"carl": 55}, {"user": "user2", "id": "21780"}, {"user": "user2"}, {"user": "123"}, {"user": []}, {"user": []}]

import json

json_data = json.load(open('reda.json'))
k = "carl"
for d in json_data:
    if k in d:
        del d[k]

CodePudding user response：

When you load a JSON file into Python using json.load, it creates a copy of that JSON in Python. When that copy is changed, these changes are not reflected in the file.

So what you need to do is then transfer your changed copy back to the file.

This can be achieved via a method in the same json library as you're using, dump. Additionally, we need to supply an additional parameter to open to specify that we are writing to the file, not just reading.

import json

json_data = json.load(open('reda.json'))
k = "carl"
for d in json_data:
    if k in d:
        del d[k]

json.dump(json_data, open('reda.json','w'))

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