Bokeh on Visual Studio Code throws AttributeError: 'BokehModel' object has no attribute '_repr_mimebundle'

[ddrinka]

ALL software version info

Library	Version
VS Code	1.71.2
python	3.9.13 64-bit
panel	0.14.0a25
jupyterlab	3.4.6
bokeh	2.4.3
jupyter-bokeh	3.0.5
pandas	1.4.4
ipywidgets	8.0.2

Complete, minimal, self-contained example code that reproduces the issue

import panel as pn
pn.extension(comms='vscode')

import pandas as pd
import holoviews as hv
from holoviews.operation import decimate
import numpy as np

hv.extension('bokeh')

x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)

table = hv.Table((x, y1, y2), 'x', ['y1', 'y2'])
chart = hv.Area(table)

decimate(chart)

Stack traceback and/or browser JavaScript console output

AttributeError                            Traceback (most recent call last)
File ~/.local/lib/python3.9/site-packages/IPython/core/formatters.py:973, in MimeBundleFormatter.__call__(self, obj, include, exclude)
    970     method = get_real_method(obj, self.print_method)
    972     if method is not None:
--> 973         return method(include=include, exclude=exclude)
    974     return None
    975 else:

File ~/.local/lib/python3.9/site-packages/holoviews/core/dimension.py:1293, in Dimensioned._repr_mimebundle_(self, include, exclude)
   1286 def _repr_mimebundle_(self, include=None, exclude=None):
   1287     """
   1288     Resolves the class hierarchy for the class rendering the
   1289     object using any display hooks registered on Store.display
   1290     hooks.  The output of all registered display_hooks is then
   1291     combined and returned.
   1292     """
-> 1293     return Store.render(self)

File ~/.local/lib/python3.9/site-packages/holoviews/core/options.py:1418, in Store.render(cls, obj)
   1416 data, metadata = {}, {}
   1417 for hook in hooks:
-> 1418     ret = hook(obj)
   1419     if ret is None:
   1420         continue

File ~/.local/lib/python3.9/site-packages/holoviews/ipython/display_hooks.py:277, in pprint_display(obj)
    275 if not ip.display_formatter.formatters['text/plain'].pprint:
    276     return None
--> 277 return display(obj, raw_output=True)

File ~/.local/lib/python3.9/site-packages/holoviews/ipython/display_hooks.py:253, in display(obj, raw_output, **kwargs)
    251 elif isinstance(obj, (HoloMap, DynamicMap)):
    252     with option_state(obj):
--> 253         output = map_display(obj)
    254 elif isinstance(obj, Plot):
    255     output = render(obj)

File ~/.local/lib/python3.9/site-packages/holoviews/ipython/display_hooks.py:141, in display_hook.<locals>.wrapped(element)
    139 try:
    140     max_frames = OutputSettings.options['max_frames']
--> 141     mimebundle = fn(element, max_frames=max_frames)
    142     if mimebundle is None:
    143         return {}, {}

File ~/.local/lib/python3.9/site-packages/holoviews/ipython/display_hooks.py:201, in map_display(vmap, max_frames)
    198     max_frame_warning(max_frames)
    199     return None
--> 201 return render(vmap)

File ~/.local/lib/python3.9/site-packages/holoviews/ipython/display_hooks.py:68, in render(obj, **kwargs)
     65 if renderer.fig == 'pdf':
     66     renderer = renderer.instance(fig='png')
---> 68 return renderer.components(obj, **kwargs)

File ~/.local/lib/python3.9/site-packages/holoviews/plotting/renderer.py:399, in Renderer.components(self, obj, fmt, comm, **kwargs)
    397 if embed or config.comms == 'default':
    398     return self._render_panel(plot, embed, comm)
--> 399 return self._render_ipywidget(plot)

File ~/.local/lib/python3.9/site-packages/holoviews/plotting/renderer.py:422, in Renderer._render_ipywidget(self, plot)
    420 widget = ipywidget(plot, combine_events=True)
    421 if hasattr(widget, '_repr_mimebundle_'):
--> 422     return widget._repr_mimebundle()
    423 plaintext = repr(widget)
    424 if len(plaintext) > 110:

AttributeError: 'BokehModel' object has no attribute '_repr_mimebundle'

[ddrinka]

This looks like a typo?
https://github.com/holoviz/holoviews/blame/07ef9b3cea7681d695cfa2fb2494a432c80a8bdd/holoviews/plotting/renderer.py#L422

[ddrinka]

This is reproducible on JupyterLab as well if the ipywidgets communication protocol is used:

import panel as pn
pn.extension(comms='ipywidgets')

import pandas as pd
import holoviews as hv
from holoviews.operation import decimate
import numpy as np

hv.extension('bokeh')

x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)

table = hv.Table((x, y1, y2), 'x', ['y1', 'y2'])
chart = hv.Area(table)

decimate(chart)

[ddrinka]

Correcting the typo leads to a further exception:

ValueError                                Traceback (most recent call last)
File ~/.local/lib/python3.9/site-packages/IPython/core/formatters.py:973, in MimeBundleFormatter.__call__(self, obj, include, exclude)
    970     method = get_real_method(obj, self.print_method)
    972     if method is not None:
--> 973         return method(include=include, exclude=exclude)
    974     return None
    975 else:

File ~/.local/lib/python3.9/site-packages/holoviews/core/dimension.py:1293, in Dimensioned._repr_mimebundle_(self, include, exclude)
   1286 def _repr_mimebundle_(self, include=None, exclude=None):
   1287     """
   1288     Resolves the class hierarchy for the class rendering the
   1289     object using any display hooks registered on Store.display
   1290     hooks.  The output of all registered display_hooks is then
   1291     combined and returned.
   1292     """
-> 1293     return Store.render(self)

File ~/.local/lib/python3.9/site-packages/holoviews/core/options.py:1422, in Store.render(cls, obj)
   1420         continue
   1421     d, md = ret
-> 1422     data.update(d)
   1423     metadata.update(md)
   1424 return data, metadata

ValueError: dictionary update sequence element #0 has length 1; 2 is required

[hoxbro]

This should be fixed with #5398

[ddrinka]

Hi @hoxbro, I wonder if we wouldn't keep this open until the changes are merged? Is there a timeline for that PR?

[github-actions]

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