Show error in python custom node

Is there a way of showing a configurable warning or error from within a custom node which is based on a python code block? This would significantly help with debugging which as a newcomer I’m finding very challenging at present.

Maybe Traceback?

but where is the traceback shown? There’s no stderr or stdout when using python in dynamo that I can see - it baffles me why this isn’t available.

I’ve tried raising exceptions in the python code but nothing is shown anywhere.

Further to this, if you have a python script as a code block, you get exceptions and errors, but as soon as you put it in a custom node you get nothing.

The only option I can see is to write to a log file

as exception:

	# if error accurs anywhere in the process catch it
	import traceback
	errorReport = traceback.format_exc()

#Assign your output to the OUT variable
if errorReport == None:
	OUT = result
	OUT = errorReport

to complete @Deniz_Maral 's post, here an alternative with a redirection of sys.stdout (with a memory file) to the variable OUT


thanks redirecting stdout to OUT is an elegant solution which I now have working