InlineGUI depends on notebook package

[arvoelke]

Describe the bug

Importing InlineGUI within a jupyter notebook can trigger a ModuleNotFoundError due to missing notebook package.

To reproduce

Steps to reproduce the behavior:

1. Install jupyter
2. Launch jupyter
3. In a separate environment, install nengo-gui and ipykernel
4. Add the nengo-gui environment as a jupyter ipykernel, e.g., python -m ipykernel install --user --name nengo-gui --display-name "Nengo-GUI" if nengo-gui is the name of the environment containing NengoGUI.
5. In jupyter, select the nengo-gui kernel, and run:

import nengo
model = nengo.Network()

from nengo_gui.ipython import InlineGUI
InlineGUI(model)

Expected behavior

I expected no error. Perhaps pip install nengo-gui[optional] should pull in the notebook. Or there should be instructions for using InlineGUI somewhere.

Screenshots

N/A

Versions

• OS: N/A
• Browser: N/A
• Nengo GUI: 0.4.6
• Other: N/A

Additional context

Using conda on a relatively fresh environment with conda install jupyter, and then adding the kernel to jupyter.