As promised, we learn more about the plug-in TI-Python, especially that unlike other calculators he does not use MicroPython but CircuitPython, an implementation actually derived from MicroPython and developed by Adafruit. It would seem to be a Circuitpython 3.0.0 implementing Python 3.4.0.
implementation = (name = ‘circuitpython’, version = (3, 0, 0))
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