AttributeError: cancel (ESP32)

[gilphilbert]

I'm trying to cancel a task created using a coro. The task runs and the start_progress() function runs, but the cancel fails as the board reports that the cancel attribute doesn't exist.

I'm running the latest 3.x firmware (esp32-idf3-20200327-v1.12-308-gdbba6b05d.bin) on an ESP32 (Adafruit ESP32 Feather).

Any hints? I can't figure out what I'm doing wrong.

This is essentially my code, with the irrelevant parts removed.

import uasyncio as asyncio

async def start_progress():
    print('test')
    await asyncio.sleep(1)

async def main(loop):
    #get data from websocket...
    if data.get('state') == 'play':
        progress = start_progress()
        loop.create_task(progress)
    else:
        asyncio.cancel(progress)

loop = asyncio.get_event_loop()
loop.create_task(main(loop))
loop.run_forever()

If you want the full code, let me know and I'll point you to it.

Thanks!

[peterhinch]

I think this is because you are using the new version of uasyncio. The cancel method is now a method of the Task instance so your code should read

progress.cancel()

I suggest you look at the new docs.

I have a substantial task updating my repo to match the new uasyncio so there will be a few discrepancies for a while. Sorry.

[gilphilbert]

Ah, you know I read that in the docs but made that deadliest of flaws... I assumed that I was on the the older version!

I'll try later and report back.