hvplot.interactive stops working and raises errors

[MarcSkovMadsen]

Panel: 0.12.6, Bokeh: 2.2.4, hvplot: 0.7.3, holoviews: 1.14.7

In https://github.com/holoviz/hvplot/issues/695 I noted that hvplot.interactive does not seem to output nicely to a responsive hvplot. I can now see that it does not matter whether responsive or not.

I've attached a reproducible notebook.

As you can see the plot only updates the first time its dragged. As you can see I can also trigger an exception sometimes.

https://user-images.githubusercontent.com/42288570/149610618-ce42e4c2-2053-4b0e-8c3d-c97655cf2006.mp4

The consequence is that hvplot.interactive is not useful currently. Sophia and I are in the process of releasing a blog post on hvplot interactive. I guess it would not make sense to post before this is solved.

Notebook

Rename from .csv to .ipynb.

hvplot_interactive_not_working.csv

Exception

I cannot provide steps to exactly reproduce. But try clicking the buttons and dragging the slider. You might also have to rerun the cell with the interactive hvplot a couple of times.

Traceback (most recent call last):
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\pyviz_comms\__init__.py", line 325, in _handle_msg
    self._on_msg(msg)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\panel\viewable.py", line 273, in _on_msg
    doc.unhold()
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\bokeh\document\document.py", line 799, in unhold
    self.callbacks.unhold()
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\bokeh\document\callbacks.py", line 396, in unhold
    self.trigger_on_change(event)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\bokeh\document\callbacks.py", line 373, in trigger_on_change
    invoke_with_curdoc(doc, event.callback_invoker)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\bokeh\document\callbacks.py", line 408, in invoke_with_curdoc
    return f()
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\bokeh\util\callback_manager.py", line 191, in invoke
    callback(attr, old, new)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\panel\reactive.py", line 302, in _comm_change
    self._process_events({attr: new})
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\panel\reactive.py", line 263, in _process_events
    self.param.set_param(**self_events)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\param\parameterized.py", line 1904, in set_param
    return self_.update(kwargs)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\param\parameterized.py", line 1877, in update
    self_._batch_call_watchers()
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\param\parameterized.py", line 2038, in _batch_call_watchers
    self_._execute_watcher(watcher, events)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\param\parameterized.py", line 2000, in _execute_watcher
    watcher.fn(*args, **kwargs)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\streams.py", line 757, in _watcher
    self.trigger([self])
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\streams.py", line 186, in trigger
    subscriber(**dict(union))
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\plot.py", line 250, in refresh
    raise e
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\plot.py", line 246, in refresh
    self._trigger_refresh(stream_key)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\plot.py", line 263, in _trigger_refresh
    self.update(key)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\plot.py", line 992, in update
    item = self.__getitem__(key)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\plot.py", line 452, in __getitem__
    self.update_frame(frame)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\bokeh\element.py", line 2438, in update_frame
    self._update_ranges(element, ranges)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\bokeh\element.py", line 813, in _update_ranges
    l, b, r, t = self.get_extents(element, ranges)
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\plot.py", line 1879, in get_extents
    xpad, ypad, zpad = self.get_padding(overlay, (x0, y0, z0, x1, y1, z1))
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\plot.py", line 1332, in get_padding
    opts = self._traverse_options(
  File "C:\Users\masma\Anaconda3\envs\hvplot_interactive\lib\site-packages\holoviews\plotting\plot.py", line 962, in _traverse_options
    return options if keyfn else options[None]
KeyError: None

[sophiamyang]

I also see this issue. The panel served notebook looks fine. The bug seems to happen in the notebook with the slider.

[hoxbro]

This can be recreated with:

import hvplot.pandas
import pandas as pd
import panel as pn

df = pd.DataFrame({"a": [0], "b": [0]})
idf = df.interactive()
slider_a = pn.widgets.IntSlider(start=0, end=1)
ipipeline = idf[idf.a == slider_a]
ipipeline.hvplot(by="a")

https://user-images.githubusercontent.com/19758978/156053051-dbb94fe5-3e6a-4cd6-9c4a-9b6172ee246d.mp4