Python read JSON file and modify

file-io, json, python

Solution

Set item using `data['id'] = ...`.

import json

with open('data.json', 'r+') as f:
    data = json.load(f)
    data['id'] = 134 # <--- add `id` value.
    f.seek(0)        # <--- should reset file position to the beginning.
    json.dump(data, f, indent=4)
    f.truncate()     # remove remaining part

Problem

Hi I am trying to take the data from a json file and insert and id then perform POST REST. my file data.json has: ``` { 'name':'myname' } ``` and I would like to add an id so that the json data looks like: ``` { 'id': 134, 'name': 'myname' } ``` So I tried: ``` import json f = open("data.json","r") data = f.read() jsonObj = json.loads(data) ``` I can't get to load the json format file. What should I do so that I can convert the json file into json object and add another id value.

Original source

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