RuntimeError: cannot enter context: <_contextvars.Context object at %> is already entered

[PerettoLucas]

Hi there,

I know there are probably plenty of issues addressing this problem, but still i didn't figure out how to fix this.

tying to work with nested event-loops more in de code example :

This code snippet throws the following error:

^CTraceback (most recent call last):
File "/usr/local/lib/python3.10/asyncio/events.py", line 80, in _run
self._context.run(self._callback, *self._args)
RuntimeError: cannot enter context: <_contextvars.Context object at %> is already entered

Obviously if i take out the nest_asyncio.apply() i get this error : RuntimeError: This event loop is already running
*also tried it with the util.patchAsyncio()

OS : linux
python version : 3.10
ib-insync version : 0.9.70

So how am i supposed to handle this ?

Now the fun part :
Take the same code and run it on :
OS : Windows 10
python version : 3.10
ib-insync version : 0.9.70

and magic starts happening.... it works ?!

would be thankful if someone could help.

best regards Lucas

[erdewit]

The issue is a blocking call (whatIfOrder) inside the onData event handler. This is easily remedied by using whatIfOrderAsync instead and turning the event handler into a coroutine (async def onData). There is no nesting needed.

The code should fail on Windows as well. Perhaps it was tried with placeOrder instead, which happens to be a non-blocking method and works as-is.