#!/usr/bin/env python

import json
import math
import os
import sys
import random

def main():
    with open('response-mock.json') as response:
        res_json = json.load(response)

    res_json[0]['counter_volume'] = random.uniform(0, 100)

    print res_json[0]['counter_volume']

if __name__ == "__main__":
    main()