Broken in jupyter qtconsole

[mackong]

When start in qtconsole like

jupyter-qtconsole --kernel=gophernotes

Enter pressed, the terminal show following messages:

2020/12/22 19:19:46 Unhandled shell message:  history_request
2020/12/22 19:19:50 Unhandled shell message:  is_complete_request

and statement is not executed.

VERSIONS:
jupyter core : 4.7.0
jupyter-notebook : 6.1.5
qtconsole : 4.7.7
ipython : 7.19.0
ipykernel : 5.3.4
jupyter client : 6.1.7
jupyter lab : 2.2.9
nbconvert : 6.0.7
ipywidgets : not installed
nbformat : 5.0.8
traitlets : 5.0.5

[cosmos72]

To be honest, I have never tried jupyter-qtconsole

Thanks for the report and the pull request, I will try jupyter-qtconsole with your fix

[cosmos72]

After merging your pull request, I added commit df600ce to distinguish between incomplete and invalid input.

I also noticed that jupyter-qtconsole inserts any error after the prompt, then inserts a newline, forcing the user to delete the error with backspaces before entering new input - does it happen to you as well?

[mackong]

Yes, same behaviour here.

Seems it is caused by reply message arrived before error message.

I tried to fix this, but I don't know how to control the order of IOPub channel and Shell channel.