mtgox all time high script

import json
import time
import datetime
import urllib2

def fetch():

    start_tid = 130500
    stop_tid = -1

    start_date = '2009-01-01'
    stop_date = '2011-06-09'

    start_ts = int(time.mktime(time.strptime(start_date, '%Y-%m-%d')))
    stop_ts = int(time.mktime(time.strptime(stop_date, '%Y-%m-%d')))

    r = { 'tid':start_tid, 'date':0 }

    arr = []

    while r['date'] < stop_ts:
        url = 'https://mtgox.com/code/data/getTrades.php?since=' + str(r['tid'])
        socket = urllib2.urlopen(url)
        js = json.load(socket)
        socket.close()
        for r in js:
            arr.append(r)

        arr.sort(key=lambda x:-float(x['price']))

        r = js[-1]

    for r in arr[0:100]:
        print r['tid'], datetime.datetime.fromtimestamp(r['date']), r['amount'], r['item'], '@', r['price'], r['price_currency']

def main():
    fetch()

if __name__ == '__main__':
    main()