open json file python

import json

data = {"key": "value"}

with open('data.json', 'w') as jsonfile:
    json.dump(data, jsonfile)

import json

with open('data.txt') as json_file:
    data = json.load(json_file)

import json

data = {}

with open('data.txt', 'w') as outfile:
    json.dump(data, outfile)