ipywidgets :: Widget Javascript not detected :: Best way to fix it?

[Paul A]

Widget Javascript not detected. It may not be installed properly. Did you enable the widgetsnbextension? If not, then run "jupyter nbextension enable --py --sys-prefix widgetsnbextension"

jupyter-client==4.2.2
jupyter-kernel-gateway==0.5.1
ipykernel==4.4.1
ipython==4.2.1
ipython-genutils==0.1.0
ipywidgets==5.1.5

Rerunning the suggested command and restarting jupyter does not fix it:

Unrecognized JSON config file version, assuming version 1
Enabling notebook extension jupyter-js-widgets/extension...
- Validating: problems found:
  - require? X jupyter-js-widgets/extension

[Paul A]

https://github.com/conda/conda/issues/2551 doesn't really help...

[Sylvain Corlay]

Hi Paul,

Since you mentioned conda in issue you refer too, I recommend that you use our conda package on the conda-forge channel.

```

conda install -c conda-forge ipywidgets

```

Thanks,

Sylvain

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[Paul A]

Actually, I don't use conda, just pip.

On Thursday, August 18, 2016 at 4:23:36 PM UTC+1, Sylvain Corlay wrote:

Hi Paul,

Since you mentioned conda in issue you refer too, I recommend that you use our conda package on the conda-forge channel.

```

conda install -c conda-forge ipywidgets

```

Thanks,

Sylvain

On Thu, Aug 18, 2016 at 5:20 PM, Paul A <rootsum...@gmail.com> wrote:

https://github.com/conda/conda/issues/2551 doesn't really help...

On Thursday, August 18, 2016 at 4:17:43 PM UTC+1, Paul A wrote:

Widget Javascript not detected. It may not be installed properly. Did you enable the widgetsnbextension? If not, then run "jupyter nbextension enable --py --sys-prefix widgetsnbextension"

jupyter-client==4.2.2
jupyter-kernel-gateway==0.5.1
ipykernel==4.4.1
ipython==4.2.1
ipython-genutils==0.1.0
ipywidgets==5.1.5

Rerunning the suggested command and restarting jupyter does not fix it:

Unrecognized JSON config file version, assuming version 1
Enabling notebook extension jupyter-js-widgets/extension...
- Validating: problems found:
  - require? X jupyter-js-widgets/extension

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[Sylvain Corlay]

Can you uninstall ipywidgets first

pip uninstall ipywidgets widgetsnbextension
pip install ipywidgets
jupyter nbextension enable --py --sys-prefix widgetsnbextension