Rumor has it that TI have been unable to get Python to run viably directly on the TI-83 Premium CE.

Graphing calculator TI-84 now gets Python with its new TI-84 Plus CE Python! Month-long battery life and more!

The new TI-84 Plus CE Python calculator comes with familiar features such as a full-color screen and a rechargeable battery that can last up to a month on a single charge.

Texas Instruments has pulled the support for assembly-based programs on its graphing calculators -- it's meant to fight cheating, but also hurts hobbyists.