Haha! I only use my python for refilling if I change more than 1 tank. It's not worth the hassle of unwinding, draining it & winding up 50ft of hose for just 1 tank. I'm not sure if it's better exercise to do that or carry many gallon jugs of (dechlored w/Prime, 2 drops/gal) water to refill. My arms & back hurt either way so I'm pretty sure either works toward a better body, lol.
I live where it's always a drought so I remove water to buckets or python out the door to favorite landscape plants. I add dechlor before tap water refill & dose heavily like dudley does, or almost. I have lots of plants so I don't worry much.
When I lived in a different (East Coast) house, I Pythoned into a bath tub with a strainer over the drain to catch plant debris & refilled from the kitchen sink. With a 50ft hose I could reach all my tanks, a small footprint house but with lots more tanks than now...but freezing temps outside so the bathtub was a better option. It really depends on your tank & house set up what as to will work best. I've always been envious of the people who only have a turn of a spigot to both drain & refill...mostly from my brief fling with hardcore discus keepers, some are very intense & motivated people too...but mostly not for just a couple tanks.