jupyter_console
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20 hours ago •
jupyter
jupyter
jupyter console broken on latest conda-forge. Regression from jupyter_client-7.0.2
At least on MacOS jupyter console 6.4.0 is broken on fresh install from conda-forge. Regression seems to be caused by jupyter_client 7.0.2. Downgrading jupyter_client from 7.0.2 to 6.1.12 seems to resolve the problem.
How to reproduce
- Fresh install from conda-forge
$ conda create -c conda-forge -n exp python=3.9 jupyter - Activate newly created environment
$ conda activate exp - Start
jupyter consoleand then hit enter$ jupyter console<hit ENTER>
Output
Click to expand
Jupyter console 6.4.0
Python 3.9.7 | packaged by conda-forge | (default, Sep 14 2021, 01:18:03)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.27.0 -- An enhanced Interactive Python. Type '?' for help.
In [1]: /opt/mambaforge/envs/exp/lib/python3.9/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 "/opt/mambaforge/envs/exp/lib/python3.9/asyncio/events.py", line 80, in _run
self._context.run(self._callback, *self._args)
File "/opt/mambaforge/envs/exp/lib/python3.9/site-packages/prompt_toolkit/input/vt100.py", line 168, in callback_wrapper
callback()
File "/opt/mambaforge/envs/exp/lib/python3.9/site-packages/prompt_toolkit/application/application.py", line 691, in read_from_input
self.key_processor.process_keys()
File "/opt/mambaforge/envs/exp/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_processor.py", line 274, in process_keys
self._process_coroutine.send(key_press)
File "/opt/mambaforge/envs/exp/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_processor.py", line 186, in _process
self._call_handler(matches[-1], key_sequence=buffer[:])
File "/opt/mambaforge/envs/exp/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_processor.py", line 329, in _call_handler
handler.call(event)
File "/opt/mambaforge/envs/exp/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_bindings.py", line 102, in call
result = self.handler(event)
File "/opt/mambaforge/envs/exp/lib/python3.9/site-packages/jupyter_console/ptshell.py", line 475, in _
self.handle_iopub()
File "/opt/mambaforge/envs/exp/lib/python3.9/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...
Workaround
Downgrading to jupyrer_client 6.1.12 seems to solve the problem
$ conda install -c conda-forge jupyter_client=6.1.12
$ jupyter console
Seems to be working OK now.
Thanks to @davidbrochart for pointing to PR https://github.com/jupyter/jupyter_console/pull/244
that seems to address the root cause of the issue migrating from jupyter_client 6.x to 7.x.
