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albertz / background-zmq-ipython

Background ZMQ IPython/Jupyter kernel
BSD 2-Clause "Simplified" License
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Client exception when using jupyter-client >= 7.0: 'coroutine' object is not subscriptable #8

Closed Dalbasar closed 2 years ago

Dalbasar commented 2 years ago

When connecting to a background zmq ipython kernel using jupyter console --existing when jupyter-client>=7.0 is installed leads to a RuntimeWarning.

\bzmqipython\lib\site-packages\zmq_future.py:591: RuntimeWarning: Proactor event loop does not implement add_reader family of methods required for zmq. Registering an additional selector thread for add_reader support via tornado. Use asyncio.set_event_loop_policy(WindowsSelectorEventLoopPolicy()) to avoid this warning. self._get_loop() Jupyter console 6.4.0

Python 3.9.9 (tags/v3.9.9:ccb0e6a, Nov 15 2021, 18:08:50) [MSC v.1929 64 bit (AMD64)] Type 'copyright', 'credits' or 'license' for more information IPython 7.30.1 -- An enhanced Interactive Python. Type '?' for help.

Hello from background-zmq-ipython. In [1]:

Sending any command results in a 'coroutine' object is not subscriptable exception:

In [1]: x = 1 \bzmqipython\lib\site-packages\jupyter_console\ptshell.py:852: RuntimeWarning: coroutine 'ZMQSocketChannel.msg_ready' was never awaited while self.client.iopub_channel.msg_ready(): RuntimeWarning: Enable tracemalloc to get the object allocation traceback

Unhandled exception in event loop: File "\AppData\Local\Programs\Python\Python39\lib\asyncio\events.py", line 80, in _run self._context.run(self._callback, *self._args) File "\bzmqipython\lib\site-packages\prompt_toolkit\input\win32.py", line 613, in ready callback() File "\bzmqipython\lib\site-packages\prompt_toolkit\application\application.py", line 690, in read_from_input self.key_processor.process_keys() File "\bzmqipython\lib\site-packages\prompt_toolkit\key_binding\key_processor.py", line 271, in process_keys self._process_coroutine.send(key_press) File "\bzmqipython\lib\site-packages\prompt_toolkit\key_binding\key_processor.py", line 186, in _process self._call_handler(matches[-1], key_sequence=buffer[:]) File "\bzmqipython\lib\site-packages\prompt_toolkit\key_binding\key_processor.py", line 321, in _call_handler handler.call(event) File "\bzmqipython\lib\site-packages\prompt_toolkit\key_binding\key_bindings.py", line 124, in call result = self.handler(event) File "\bzmqipython\lib\site-packages\jupyterconsole\ptshell.py", line 475, in self.handle_iopub() File "\bzmqipython\lib\site-packages\jupyter_console\ptshell.py", line 854, in handle_iopub msg_type = sub_msg['header']['msg_type']

Exception 'coroutine' object is not subscriptable Press ENTER to continue...

I am using Python 3.9.9 on Windows 10 64bit and with jupyter-client==6.1.12 (and ipykernel==5.5.6) it works fine.

Dalbasar commented 2 years ago

This seems to be an upstream problem in the jupyter_console (<=6.4.0) \ jupyter_client > 7.0 modules, because it also happens when spawing an ipython kernel directly via ipython kernel in the command line.

It seems it will be fixed in jupyter_console 6.4.1, see https://github.com/jupyter/jupyter_console/pull/244 https://github.com/jupyter/jupyter_console/issues/251 https://github.com/jupyter/jupyter_client/issues/690