I'm not sure what the correct repo is to report this... I picked here because downgrading to notebook<7 fixes the issue.

Description

If I use this in a notebook cell:

import matplotlib.pyplot as plt
import numpy as np

%matplotlib notebook
plt.plot(np.arange(5))

I get the error:

Javascript Error: IPython is not defined

Reproduce

1. conda create python=3.11 -n mynb
2. pip install jupyter notebook matplotlib
3. make new jupyter notebook with the above cell

Expected behavior

If I downgrade pip install "notebook<7" then a plot appears (with no error message)

Context

• Operating System and version: windows 11
• Browser and version: Chrome

• Jupyter Notebook version:

$ jupyter --version
Selected Jupyter core packages...
IPython          : 8.16.1
ipykernel        : 6.25.2
ipywidgets       : 8.1.1
jupyter_client   : 7.4.9
jupyter_core     : 5.4.0
jupyter_server   : 2.8.0
jupyterlab       : 4.0.7
nbclient         : 0.8.0
nbconvert        : 7.9.2
nbformat         : 5.9.2
notebook         : 7.0.6
qtconsole        : 5.4.4
traitlets        : 5.11.2

Paste the output from running `jupyter troubleshoot` from the command line here.
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Paste the output from your command line running `jupyter notebook` here, use `--debug` if possible.

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