If you plan on making a Ball Python enclosure out of glass I recommend that you paint the glass black or hang black paper. Do something to black out all but the door in order to give your Ball Python a feeling of security.
I keep my adult females in CB-70 tubs (http://www.reptilebasics.com/iris-cb-70-rack). These provide them with room to move around and thermoregulate while also providing a feeling of security and concealment.
I recommend designing your enclosures to a similar size.
I would also recommend checking out http://rickysreptileenclosures.com/ to get an idea of a appropriately size BP enclosure.