holoviews (fresh) jupyterlab extension problem

[stonebig]

not sure if it's me or holoviews:

• this type of example doesn't seem work (yet) in Jupyterlab:

  
  # Holoviews
  # for more example, see http://holoviews.org/Tutorials/index.html
  import numpy as np
  import holoviews as hv
  hv.extension('matplotlib')
  dots = np.linspace(-0.45, 0.45, 11)
  fractal = hv.Image(image)

layouts = {y: (fractal * hv.Points(fractal.sample([(i,y) for i in dots])) + fractal.sample(y=y) ) for y in np.linspace(0, 0.45,11)}

hv.HoloMap(layouts, kdims=['Y']).collate().cols(2)

giving:
![holoju01](https://user-images.githubusercontent.com/4312421/36755004-0ef2528c-1c0b-11e8-90ca-7ac4ab46c64f.PNG)

but the ultra-tricky one ... does ???

![holoju02](https://user-images.githubusercontent.com/4312421/36755077-4ffcda4a-1c0b-11e8-91ef-e42a4bf9b112.PNG)

[philippjfr]

Damn, spoke too soon, it still works fine after rebuilding all the extensions. Never have I wanted something not to work more!

[ea42gh]

You had to rebuild the extensions? Might that be the issue @stonebig is facing?

[philippjfr]

Not sure what you mean all extensions are rebuilt whenever you install a labextension.

[ea42gh]

I was wondering how you got into an inconsistent state

[philippjfr]

Installing a new version of JLab temporarily uninstalls existing extensions.

[philippjfr]

@stonebig Okay, if you're not sick of it by now, could you have another go? I've now replaced the jquery-ui dependency with noUISlider in pyviz/jupyterlab_holoviews 0.3.0, along with some CSS fixes in https://github.com/ioam/holoviews/pull/2456.

[bltpyro]

I'll just comment that I'm having the same problem. Standard notebook works fine, but I'm seeing the same thing as him (no graphs, I updated jupyterlab and the extension and did the rebuild, but it still happens with the same block of code being used here.

Chrome 65.0.3325.181 (Official Build) (64-bit) Python 3.6 holoviews 1.9.4 Jupyter notebook version 5.4.1 Jupyter lab version 0.31.12 matplotlib 2.1.1 bokeh 0.12.14

Known labextensions:

@jupyterlab/plotly-extension
        @jupyterlab/plotly-extension v0.14.4 enabled  ok
@pyviz/jupyterlab_holoviews
        @pyviz/jupyterlab_holoviews v0.3.2 enabled  ok
jupyter-matplotlib
        jupyter-matplotlib v0.3.0 enabled  ok
jupyterlab_bokeh
        jupyterlab_bokeh v0.4.0 enabled  ok

HoloViews.jQuery.ui

Uncaught ReferenceError: HoloViews is not defined at <anonymous>:1:1

When running the cell it says:

JupyterLab does not execute inline JavaScript in HTML output

At the very top of the console it says

Plugin 'matplotlib-jupyter:main' failed to activate.
    Error: No provider for: jupyter.extensions.jupyterWidgetRegistry.

I tried with bokeh backend and get the same result.

I'm happy to try anything you can think of.

[philippjfr]

@bltpyro Different issue, you'll have to get holoviews master and bokeh master (or bokeh 0.12.15dev5) to get things working. I'm fairly confident the issue is now resolved with those versions.

[stonebig]

trying today ...

[crlag]

Hi, I am having the same issue with jupyterlab as @stonebig. I've installed all the extensions, but still no luck with the bokeh. However, it works with the matplolib extension.

[philippjfr]

@crlag Could you check which versions of holoviews, bokeh and jupyterlab_bokeh you have and report those here? Currently this is required:

conda install -c bokeh/label/dev bokeh
conda install -c ioam/label/dev holoviews
jupyter labextension install @pyviz/jupyterlab_holoviews

One you've done that you should have bokeh 0.12.15devX, holoviews 1.10.0a2 and jupyterlab_holoviews 0.3.2. There's also some CSS improvements that are only available on HoloViews master, but that setup should be enough to get things working.

[crlag]

@philippjfr that was the problem... now its working. Thank you!

[stonebig]

it works !

[philippjfr]

Thanks for being our guinea pig and for following up multiple times!

[stonebig]

Thanks for having taken care of my not-your-mainstream use-case, hope it will have improved Holoviews for others also.

[arokem]

This same issue is currently solved for me by adding:

jupyter labextension install @pyviz/jupyterlab_pyviz

to my installation process (the process mentioned in https://github.com/pyviz/holoviews/issues/2379#issuecomment-375916214 is now outdated)