gistfile1.txt

import urllib2
import json
import time

filename="data.json"

while(1):
    response = urllib2.urlopen("https://api.bitcoinaverage.com/no-mtgox/ticker/USD")
    data = json.load(response)
    fh = open(filename, "w")
    json.dump(data, fh)
    fh.close()
    time.sleep(30)