The bad thing about the Python is that it relies on water pressure to suction out water. If you turn off the faucet during draining, it's very slow.
It's a lot more effectively to buy pool hosing from a pool store or sump hosing from HD and use that instead. That way you'll be draining water out of a 1 1/4" hose instead of the small hose that the Python uses. Plus you will be using gravity instead of using water pressure and wasting water with the Python.
I use this : http://m.homedepot.com/p/Flotec-Sump-Pump-Discharge-Hose-Kit-FP0012-6U-P2/100645330. You glue a 1 1/4" pvc pipe to one end and a shutoff valve to the other. Then you start the suction by sucking in air like a regular siphon. I can drain my 210 g tank in about 15 mins.
Very interesting. Do you happen to have a picture of the finished product? Thanks.