assorted pyflakes fixes I (re-)discovered pyflakes today and ran it over to roundup code to see what it had to say. It reported a ton of "imported module foo but you're not actually using it" warnings and a couple of actual errors that this patch fixes. The code was wrong but it was mostly stuff that never gets executed...like hyperdb.Choice.

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