import requests
import json


def extract_time(json):
    try:
        return int(json[1]["updated"])
    except KeyError:
        return 0


def main():
    response = requests.get('https://api.exmo.com/v1/ticker/')

    json_data = json.loads(response.content.decode('utf-8'))

    json2 = []
    for s in json_data.items():
        json2.append(s)

    json2.sort(key=extract_time, reverse=True)

    fieldnames = ["symbol", "buy_price", "sell_price", "last_trade",
                  "high", "low", "avg", "vol", "vol_curr", "updated"]

    with open('json_data.csv', "w") as out_file:
        out_file.write(';'.join(fieldnames) + '\n')
        for s in json2:
            s1 = s[0] + ';'
            s2 = ';'.join(map(str, s[1].values()))
            out_file.write(s1 + s2 + '\n')


if __name__ == '__main__':
    main()