In the beginning, Intel maintained CPython 2.x for UEFI. Current version is 2.7x. It looks like they may have stopped porting it, I am unclear.
In addition to Intel’s CPython 2.7x port, recently Google has proposed updating CPython 3.x to support UEFI, see:
I may’ve missed it, but I not sure Intel is involved with this effort.
At the UEFI Plugfest later this month, Intel is giving a talk about MicroPython for UEFI, “Implementing MicroPython in UEFI”. So I am *guessing* that Intel has chosen MicroPython over CPython. I presume this means that CPython 2.7x port is now abandonware. I hope the CPython 3.x proposal is not dead, because of this MicroPython effort. Hoping both get traction, but will not hold my breath…
https://micropython.org/
https://github.com/micropython/micropython
Differences between CPython and MicroPython:
http://docs.micropython.org/en/latest/pyboard/genrst/index.html
https://pypi.python.org/pypi?%3Aaction=search&term=micropython
Once once of these Python 3.x implementations works, and the CHIPSEC project ports from 2.x to 3.c, I can finally stop using v2!!
Firmware Security 