Get index position for a JSON item in Python

Question

I need to be able to get the index position of a certain item within a JSON file using Python so that I am able to append something to another item within that same position.

JSON below:

{
    "members": [{
            "username": "John Doe#0001",
            "possesions": []
        },
        {
            "username": "Samantha Green#0001",
            "possesions": []
        }
    ]
}

I need to find what position in members John Doe#0001 is in for example. So I can then append something to the possesions list like so:

data = json.load(jsonFile)
temp = data['members'][Index position]['possesions']
temp.append("something")

Ive tried googling to no success.

John Gordon · Accepted Answer · 2020-07-29 04:35:27Z

2

You can loop through all the members until you find the one you want:

data = json.load(jsonFile)
for member in data['members']:
    if member['username'] == 'John Doe#0001':
        member['posessions'].append(something)

answered Jul 29, 2020 at 4:35

John Gordon

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1 Comment

Jiří Baum Over a year ago

This solution skips the index number altogether, which is usually simpler; however, if the index number is needed for some purpose, the enumerate built-in function can provide it: for i, member in enumerate(data['members']): ...

Purushothaman Srikanth · Accepted Answer · 2024-02-21 20:46:21Z

0

The JSON is a dictionary in Python. It is not indexed but can be looped through using keys. If you want to replace the value of the particular key, you can replace directly using

data["key"]=new_value

edited Feb 21, 2024 at 20:46

Purushothaman Srikanth

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answered Jul 29, 2020 at 5:26

Vikram Shinde

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Comments

Purushothaman Srikanth · Accepted Answer · 2024-02-22 16:12:42Z

0

import json
    
json_file={
    "members": [{
            "username": "John Doe#0001",
            "possesions": []
        },
        {
            "username": "Samantha Green#0001",
            "possesions": []
        }
    ]
}

dicti = json.loads(json_file)

for i in range(len(dicti)):
    if dict['members'][i]['username'] == "John Doe#0001":
        print(i)

But before that, you must check if your data is in JSON format. If it is in the dictionary then it will show an error in this

dicti = json.loads(json_file) line.

edited Feb 22, 2024 at 16:12

Purushothaman Srikanth

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answered Jul 29, 2020 at 4:59

Dwipal shrirao

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1 Comment

John Gordon Over a year ago

You want range(len(dict['members'])), not range(len(dict)).

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