jupyter_console: RuntimeWarning: coroutine 'ZMQSocketChannel.msg_ready' was never awaited

After lots of trial-and-errors with different versions of pyzmq, prompt-toolkit, jupyter_client, jupyter_console, I’ve recovered jupyter-console. That was indeed a dependency hell problem.

Unclear what the actual fix is. Maybe downgrading jupyter-client 6.2.0 to jupyter-client 6.1.12.

On python3.7, downgrading from jupyter-client 7.0.1 to 6.1.12 worked for me.

Getting the same issue in a fresh install of Ubuntu 21.04, python 3.9.5, using Anaconda as installer. Downgrading to 6.1.12 also worked for me (conda install jupyter_client=6.1). Let me know if there’s any way I can help address this issue.

I have a similar issue; a Void Linux contributor has PR’ed an omnipus jupyter update and running jupyter console triggers the RuntimeWarning about ZMQSocketChannel.msg_ready not being awaited. Downgrading only python3-jupyter_client to 6.1.0_2 (the version currently packaged in Void) resolves the issue.

PyZMQ is installed via the python3-pyzmq-22.1.0_1 package in Void, although an earlier version also triggered the issue.

Edit: Void update PR: https://github.com/void-linux/void-packages/pull/30873

Same issue here! Mac OS 11.6. Homebrew Python 3.10.0 and 3.9.7, and Perl 5.34.0. Trying to use IPerl kernel. Fixed by downgrading jupyter_client to 6.1.12 via pip3 install -Iv jupyter_client==6.1.12.

3.10.0:

~ % jupyter kernelspec list
Available kernels:
 iperl      /Users/iremizov/Library/Jupyter/kernels/iperl
 python3    /usr/local/share/jupyter/kernels/python3
~ % iperl
Jupyter console 6.4.0

IPerl!Traceback (most recent call last):
 File "/usr/local/bin/jupyter-console", line 8, in <module>
   sys.exit(main())
 File "/usr/local/lib/python3.10/site-packages/jupyter_core/application.py", line 264, in launch_instance
   return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
 File "/usr/local/lib/python3.10/site-packages/traitlets/config/application.py", line 846, in launch_instance
   app.start()
 File "/usr/local/lib/python3.10/site-packages/jupyter_console/app.py", line 148, in start
   self.shell.mainloop()
 File "/usr/local/lib/python3.10/site-packages/jupyter_console/ptshell.py", line 664, in mainloop
   main_task = asyncio.wait(tasks, loop=loop, return_when=asyncio.FIRST_COMPLETED)
TypeError: wait() got an unexpected keyword argument 'loop'
sys:1: RuntimeWarning: coroutine 'ZMQTerminalInteractiveShell.interact' was never awaited

3.9.7:

~ % iperl
Jupyter console 6.4.0

IPerl!
In [1]: q/usr/local/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 "/usr/local/Cellar/python@3.9/3.9.7/Frameworks/Python.framework/Versions/3.9/lib/python3.9/asyncio/events.py", line 80, in _run
    self._context.run(self._callback, *self._args)
  File "/usr/local/lib/python3.9/site-packages/prompt_toolkit/application/application.py", line 691, in read_from_input
    self.key_processor.process_keys()
  File "/usr/local/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_processor.py", line 274, in process_keys
    self._process_coroutine.send(key_press)
  File "/usr/local/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 "/usr/local/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_processor.py", line 329, in _call_handler
    handler.call(event)
  File "/usr/local/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_bindings.py", line 102, in call
    result = self.handler(event)
  File "/usr/local/lib/python3.9/site-packages/jupyter_console/ptshell.py", line 475, in _
    self.handle_iopub()
  File "/usr/local/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...

Yeah it’s working for me now on macOS. Stellar, thank you.

Reproduced on MacOs python 3.9.9 iTerm2 Build 3.4.14

python3 -m venv env
source env/bin/activate
(env) pip install jupyter
(env) jupyter console

jupyter console
Jupyter console 6.4.0

Python 3.9.9 (main, Nov 21 2021, 03:23:42)
Type 'copyright', 'credits' or 'license' for more information
IPython 8.0.1 -- An enhanced Interactive Python. Type '?' for help.

In [1]: ?

/Users/user/project/env/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 "/usr/local/Cellar/python@3.9/3.9.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/asyncio/events.py", line 80, in _run
    self._context.run(self._callback, *self._args)
  File "/Users/user/project/env/lib/python3.9/site-packages/prompt_toolkit/input/vt100.py", line 170, in callback_wrapper
    callback()
  File "/Users/user/project/env/lib/python3.9/site-packages/prompt_toolkit/application/application.py", line 704, in read_from_input
    self.key_processor.process_keys()
  File "/Users/user/project/env/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_processor.py", line 271, in process_keys
    self._process_coroutine.send(key_press)
  File "/Users/user/project/env/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 "/Users/user/project/env/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_processor.py", line 321, in _call_handler
    handler.call(event)
  File "/Users/user/project/env/lib/python3.9/site-packages/prompt_toolkit/key_binding/key_bindings.py", line 124, in call
    result = self.handler(event)
  File "/Users/user/project/env/lib/python3.9/site-packages/jupyter_console/ptshell.py", line 475, in _
    self.handle_iopub()
  File "/Users/user/project/env/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...

In [1]:
Do you really want to exit ([y]/n)? y
Shutting down kernel
sys:1: RuntimeWarning: coroutine 'ZMQSocketChannel.get_msg' was never awaited
RuntimeWarning: Enable tracemalloc to get the object allocation traceback

Isn’t this fixed by https://github.com/jupyter/jupyter_console/pull/244?