Python 3 preparation: convert print to a function. Tool-assisted patch. It is possible that some "from __future__ import print_function" are not in fact needed, if a file only uses print() with a single string as an argument and so would work fine in Python 2 without that import.

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