#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2008 Doug Hellmann All rights reserved.
     #
     """
     """
     
     __version__ = "$Id$"
     #end_pymotw_header
     
     import gzip
     import os
     import hashlib
     
     def get_hash(data):
         return hashlib.md5(data).hexdigest()
     
     data = open('lorem.txt', 'r').read() * 1024
     cksum = get_hash(data)
     
     print 'Level  Size        Checksum'
     print '-----  ----------  ---------------------------------'
     print 'data   %10d  %s' % (len(data), cksum)
     
     for i in xrange(1, 10):
         filename = 'compress-level-%s.gz' % i
         output = gzip.open(filename, 'wb', compresslevel=i)
         try:
             output.write(data)
         finally:
             output.close()
         size = os.stat(filename).st_size
         cksum = get_hash(open(filename, 'rb').read())
         print '%5d  %10d  %s' % (i, size, cksum)