QUERY · ISSUE

Add yield support in async function

openby m24hopened 2024-04-19updated 2024-04-19

enhancement

I agree to follow the MicroPython Code of Conduct to ensure a safe and respectful space for everyone.
I've searched for existing issues regarding this feature, and didn't find any.

Just in PEP 525, it's really easy to make a async generator instead of coding a new class with aiter and anext .

Just like this:

async def test():
   for i in range(5):
      await something
'     yield i

I believe this is an important syntax that makes asynchronous generation as convenient as normal generators.

I intend to implement this feature and would submit a Pull Request if desirable.
I hope the MicroPython maintainers or community will implement this feature.
I would like to Sponsor development of this feature.

CANDIDATE · PULL REQUEST

py: add async/await/async for/async with syntax

closedby pohmelieopened 2016-01-27updated 2016-04-13

They are sugar for marking function as generator, "yield from"
and pep492 python "semantically equivalents" respectively.

LINK micropython
   text    data     bss     dec     hex filename
 353064    1544    2176  356784   571b0 micropython

micropython file size = 359472 bytes

LINK micropython
text    data     bss     dec     hex filename
356192    1544    2176  359912   57de8 micropython

micropython file size = 363568 bytes

LINK build-PYBV10/firmware.elf
   text    data     bss     dec     hex filename
 284132     336   28500  312968   4c688 build-PYBV10/firmware.elf

firmware.elf file size = 565025 bytes

LINK build-PYBV10/firmware.elf
   text    data     bss     dec     hex filename
 285732     336   28500  314568   4ccc8 build-PYBV10/firmware.elf

firmware.elf file size = 565561 byte