random numbers to a file

import time
import sys
import random


def main(argv):
  if len(argv) == 1:
    print 'Usage: python txtfile.py random-seed(int)'
    return 0

  i = 0
  seed = int(argv[1])
  random.seed(seed)
  print 'Ctrl-C to cancel the loop'
  try:
    with file('random_numbers.txt', 'w') as fp:
      while True:
        rnd = random.randint(1, 100)
        message = 'iteration: {ITER}, random number: {RND}\n'.format(ITER=i, RND=rnd)
        fp.write(message)
        time.sleep(3)
        i += 1

  except KeyboardInterrupt:
    print 'Ctrl-C, exit'
    return 0

if __name__ == '__main__':
  main(sys.argv)