Minimal example to test interrupting execution of code using pyodide.

Tracked in pyodide Issue #5927
pyodide/pyodide#5927


Problem occurs only in Chrome, not in Firefox.
Chrome 140.0.7339.207
Firefox 140.3.0esr


Trouble is occurring when running code using PyodideConsole
and trying to interrupt code that uses time.sleep

Sometimes execution is interrupted as expected. (Maybe 1 in 5 chance).



Most often execution continues uninterrupted and this is shown on STDERR:
(only when NOT using the filename=... parameter to runsource, otherwise it passes silently)

REQUESTING Keyboard Interrupt
Exception ignored in:
._remove at 0xbf3f88>
Traceback (most recent call last):
File "/lib/python313.zip/_weakrefset.py", line 39, in _remove
KeyboardInterrupt
:


This seems to be because the sleep is running asynchronously
and cannot be interrupted.

When this happens, it's possible to keep REQUESTING an interrupt.
Eventually it will stop and give this on STDERR:

REQUESTING Keyboard Interrupt
Traceback (most recent call last):
File "", line 123, in __subclasscheck__
TypeError: issubclass() arg 1 must be a class
/lib/python313.zip/pyodide/webloop.py:663: RuntimeWarning: coroutine 'sleep' was never awaited
run_sync(sleep(t))
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
Traceback (most recent call last):
File "", line 123, in __subclasscheck__
TypeError: issubclass() arg 1 must be a class
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "", line 3, in
File "/lib/python313.zip/pyodide/webloop.py", line 663, in _sleep
run_sync(sleep(t))
~~~~~~~~^^^^^^^^^^
pyodide.ffi.ConversionError: Conversion from python to javascript failed