ok so first thing how big is your python and how big is it's cage. Then i can give more info. As for the heating in tubs, hang the lamp from somthing, if your can't find anything to hang it from, put a small hook in the ceiling and hang it from there. I personally like glass tanks and the only thing i would reccomend tubs for a babys because tubs can be not so see through and they scare really easily and it feels a little more secure to them.