MicroPython

 micropython/micropython: MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems @GitHub

C, MIT license

This is the MicroPython project, which aims to put an implementation of Python 3.x on microcontrollers and small embedded systems. You can find the official website at micropython.org.

MicroPython implements the entire Python 3.4 syntax (including exceptions, with, yield from, etc., and additionally async/await keywords from Python 3.5 and some select features from later versions). 

MicroPython - Python for microcontrollers

Overview — MicroPython latest documentation

PythonImplementations - Python Wiki