Open
Description
MicroPython allows a task to be created before issuing .run() but CPython throws an exception.
try:
import uasyncio as asyncio
except ImportError:
import asyncio
async def foo():
await asyncio.sleep(3)
async def bar():
await foo_task
foo_task = asyncio.create_task(foo()) # Naughty code here...
asyncio.run(bar())Outcome under CPython 3.8.0:
adminpete@debian8:/mnt/qnap2/temp$ python3 -m rats_x
Traceback (most recent call last):
File "/usr/local/lib/python3.8/runpy.py", line 192, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/local/lib/python3.8/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/mnt/qnap2/temp/rats_x.py", line 12, in <module>
foo_task = asyncio.create_task(foo())
File "/usr/local/lib/python3.8/asyncio/tasks.py", line 381, in create_task
loop = events.get_running_loop()
RuntimeError: no running event loop
sys:1: RuntimeWarning: coroutine 'foo' was never awaited
My view is that this doesn't matter, but I thought it worth reporting.