Bug: Issue installing new kernel from main

[mlucool]

While I was able to install the ipykernel from main, when I tried to make a new kernel I ran into the following error:

.venv/lib64/python3.11/site-packages/ipykernel/kernelapp.py", line 734, in main
    if self.kernel.eventloop:
       ^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'eventloop'

Manually creating a kernel worked fine

[davidbrochart]

It looks like you didn't call the initialize() method:

ipykernel/ipykernel/kernelapp.py

Lines 748 to 750 in 772dfb8

	app = IPKernelApp.instance()
	app.initialize()
	app.start()

[mlucool]

Sorry for the bad error report, I ran python -m ipykernel install --name mykernel --user, which works for 6.x