import urllib
import re
import time
import sys

url_re = re.compile('<h3>Permanent link to this comic: http://xkcd.com/(?P<number>[0-9]+)/')
url = 'http://dynamic.xkcd.com/comic/random/' 
data = file('numbers.data', 'a')

for x in xrange(0, 10000):
  response = urllib.urlopen(url)
  for line in response.readlines():
    if url_re.match(line):
      url_re_match = url_re.match(line)
      number = url_re_match.group('number')
      print >>data, number
  response.close()
  time.sleep(1)
  # we print a dot to show progress
  if (x%100 == 0):
    print '.',
    sys.stdout.flush()
data.close()