Python 3 preparation: use sum() instead of reduce(). reduce() has changed from a built-in function to something in functools in Python 3. However, since both uses were with operator.add / operator.__add__, it seemed to make more sense to use sum() instead of functools.reduce().

#!/usr/bin/env python
import zlib, base64, sys
print base64.encodestring(zlib.compress(sys.stdin.read()))