Friday, 29 April 2016

Python code to read and write array to file in json format

First install and import 'json' module

import json

Reading JSON object from file:

def read_json_from_file(json_file):
    Read array of objects from a file in json format.
    :param json_file: input json file name
    :return: array of objects from the json
    with open(json_file, 'r') as f:
        exp_string = json.load(f)
        json_array = json.loads(exp_string)
    return json_array

Writing JSON to the file:

def write_json_to_file(array, out_file_name):
    Dump an array to file in json format.
    :param array: Array to write to the file
    :param out_file_name: output file name
    with open(out_file_name, 'w') as out_f:
        s = json.dumps([o.__dict__ for o in array], sort_keys=True)
        json.dump(s, out_f)

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