To make things easy for the common user, he wrote a library called EasyTransfer which abstracts packetized serial communications between two Arduino boards.

It is now possible to run Arduino and MicroPython side-by-side on multi-core microcontrollers. Opening up a wealth of new applications across ...

See Efficient communication between Arduino* and Linux native processes. However, it's not easy to use the in-memory shared lock between python process and Arduino process.

Arduino microcontrollers have added Python to the range of compatible programming languages. Others can be used, and not just Arduino's own IDE app.