Python 2.4 implementation of Adler32 checksum

adler32-24.py

#!/usr/bin/env python
import sys,zlib

for filename in sys.argv[1:]:
	try:
		file = open(filename,'rb')
		part_sum = 1;
		while True:
			buf = file.read(1024*128)
			n = len(buf)
			if n == 0:
				break
			part_sum = zlib.adler32(buf, part_sum)
		print ("%08X  %s" % (part_sum & 0xFFFFFFFF, filename))
	except IOError, (e):
		sys.stderr.write('%s: %s: %s\n' % (sys.argv[0], filename, e))