(fix) python3 set requires custom hash
(fix) python3 set requires custom hash

Signed-off-by: Ning Sun <a92165a57b6171072bd20ae225e0a6a0a2860443@about.me>

pombredanne/jip,pombredanne/jip,baztian/jip,sunng87/jip,sunng87/jip,baztian/jip