Cannot get to the cause of this error citing MemoryError:

[fma]

Modules like threading are not planned to be ported at all; if you rely on it, you will have to switch to another solution, like asyncio.

I also have a project to migrate this way...

[dhylands]

Well there is hope if you or someone else ports the missing modules.

I wouldn't count on it happening soon. Although if you're using a Raspberry Pi, there is 512 Mb of RAM, so you can just use regular python.