meow.py

import time
import urllib

url = 'http://pub1.di.fm/di_classictrance'
filename = 'a.mp3'
time_limit = 10
starttime = time.time()


def callback(count, blocksize, filesize):
    r = urllib.urlopen(url)
    print r.info()
    elapsed = time.time() - starttime
    if elapsed > time_limit:
        raise Exception("hit timelimit")

try:
    f = open(filename, 'w')
except IOError:
    raise IOError('Cannot write to {0}'.format(filename))
else:
    f.close()

try:
    urllib.urlretrieve(url, filename=filename, reporthook=callback)
except Exception as e:
    print e.message