404 GET error

[rannbaron]

Running
%matplotlib ipympl
import matplotlib.pyplot as plt
plt.plot([1,2,3])
plt.show()

Results in no graphic display, and the following in console:

[W 17:14:27.611 NotebookApp] 404 GET /nbextensions/jupyter-matplotlib.js?v=20180807170809 (::1) 11.85ms referer=http://localhost:8888/notebooks/Untitled.ipynb?kernel_name=python3
[W 17:14:27.737 NotebookApp] 404 GET /nbextensions/widgets/notebook/js/extension.js?v=20180807170809 (::1) 1.95ms referer=http://localhost:8888/notebooks/Untitled.ipynb?kernel_name=python3
[I 17:14:28.138 NotebookApp] Adapting to protocol v5.1 for kernel eea1e6df-7b2b-4d54-8410-9b9cfbda7a64
[W 17:14:32.004 NotebookApp] 404 GET /static/jupyter-matplotlib.js?v=20180807170809 (::1) 2.26ms referer=http://localhost:8888/notebooks/Untitled.ipynb?kernel_name=python3

I installed ipympl from pip3 on Debian.

Help please!

[larsoner]

FYI I just hit the same issue and fixed it by setting in ~/.jupyter/nbconfig/notebook.json:

{
  "load_extensions": {
    "jupyter-matplotlib/extension": true,
    ...
  }
}

[thomasaarholt]

@larsoner, what OS are you on? Debian as well?

[larsoner]

Ubuntu 20.04, so yeah Debian-based, installed using pip.