KeyError raised when using combination of checkbox, interactive dataframe, linked_selections, and hover_cols.

[spenceforce]

Same error as #5412, but this example doesn't use streamz.

ALL software version info

(this library, plus any other relevant software, e.g. bokeh, python, notebook, OS, browser, etc)

Used a fresh holoviews installation using the instructions from installation page.

Relevant conda environment from mamba list

# Name                    Version                   Build  Channel
bokeh                     3.3.4           py311h92b7b1e_0
colorcet                  3.0.1           py311h06a4308_0
datashader                0.16.0          py311h06a4308_0
holoviews                 1.18.2          py311h06a4308_0
hvplot                    0.9.2           py311h06a4308_0
pandas                    2.1.4           py311ha02d727_0
panel                     1.3.8           py311h06a4308_0
param                     2.0.2           py311h06a4308_0
python                    3.11.7               h955ad1f_0

OS info:

  Operating System: Red Hat Enterprise Linux 8.5 (Ootpa)
       CPE OS Name: cpe:/o:redhat:enterprise_linux:8::baseos
            Kernel: Linux 4.18.0-348.20.1.el8_5.x86_64
      Architecture: x86-64

Description of expected behavior and the observed behavior

This error shows up when all conditions below are met:

1. An interactive dataframe filtered on pn.widgets.CheckBoxGroup.
2. Multiple plots using the dataframes hvplot plotting methods with the hover_cols argument.
3. Multiple plots passed to hv.linked_selection.interaction().
4. Checking a checkbox when all checkboxes are unchecked.

The expected behavior would be for the markers associated with the newly checked checkbox to appear in the plots.

The observed behavior is a KeyError from python and blank plots in the browser.

Note that if hover_cols isn't specified, or only one plot is passed to hv.linked_selection.interaction() this error doesn't occur. There's something about specifying hover_cols and having more than one plot in an interactive layout.

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

I've tested this in a notebook and using the panel serve test.py command on the below code.

# test.py
import holoviews as hv
import pandas as pd
import panel as pn

import hvplot.pandas

df = pd.DataFrame({"category": ["A", "B", "B"], "x": [1, 2, 3], "y": [1, 2, 3]})
dfi = df.interactive()

options = sorted(df["category"].unique())
checkboxes = pn.widgets.CheckBoxGroup(
    name="Checkboxes", value=options, options=options, inline=True
)

filtered = dfi[dfi["category"].isin(checkboxes)]

ls = hv.link_selections.instance()
pn.Column(ls(filtered.hvplot.scatter(x="x", y="y", hover_cols=["category", "x", "y"]) + filtered.hvplot.scatter(x="x", y="y", hover_cols=["category", "x", "y"]))).servable()

Stack traceback and/or browser JavaScript console output

Stack traceback from panel server:

2024-02-07 17:01:08,766 ERROR: panel.reactive - Callback failed for object named "Checkboxes" changing property {'value': ['A']}
Traceback (most recent call last):
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/panel/reactive.py", line 385, in _process_events
    self.param.update(**self_events)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/param/parameterized.py", line 2278, in update
    restore = self_._update(*args, **kwargs)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/param/parameterized.py", line 2318, in _update
    self_._batch_call_watchers()
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/param/parameterized.py", line 2509, in _batch_call_watchers
    self_._execute_watcher(watcher, events)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/param/parameterized.py", line 2471, in _execute_watcher
    watcher.fn(*args, **kwargs)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/streams.py", line 777, in _watcher
    self.trigger([self])
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/streams.py", line 189, in trigger
    subscriber(**dict(union))
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 243, in refresh
    raise e
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 239, in refresh
    self._trigger_refresh(stream_key)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 257, in _trigger_refresh
    self.update(key)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 956, in update
    item = self.__getitem__(key)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 443, in __getitem__
    self.update_frame(frame)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/bokeh/element.py", line 2014, in update_frame
    ranges = self.compute_ranges(self.hmap, key, ranges)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 614, in compute_ranges
    self._compute_group_range(group, elements, ranges, framewise,
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 862, in _compute_group_range
    filtered = [r for i, r in zip(ids, values[g]) if i not in prev_ids]
                                       ~~~~~~^^^
KeyError: 'factors'
2024-02-07 17:01:08,769 Exception in callback functools.partial(<bound method IOLoop._discard_future_result of <tornado.platform.asyncio.AsyncIOMainLoop object at 0x7f3bf384ce50>>, <Task finished name='Task-8695' coro=<ServerSession.with_document_locked() done, defined at /home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/bokeh/server/session.py:77> exception=KeyError('factors')>)
Traceback (most recent call last):
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/tornado/ioloop.py", line 738, in _run_callback
    ret = callback()
          ^^^^^^^^^^
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/tornado/ioloop.py", line 762, in _discard_future_result
    future.result()
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/bokeh/server/session.py", line 98, in _needs_document_lock_wrapper
    result = await result
             ^^^^^^^^^^^^
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/panel/reactive.py", line 431, in _change_coroutine
    state._handle_exception(e)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/panel/io/state.py", line 442, in _handle_exception
    raise exception
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/panel/reactive.py", line 429, in _change_coroutine
    self._change_event(doc)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/panel/reactive.py", line 447, in _change_event
    self._process_events(events)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/panel/reactive.py", line 385, in _process_events
    self.param.update(**self_events)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/param/parameterized.py", line 2278, in update
    restore = self_._update(*args, **kwargs)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/param/parameterized.py", line 2318, in _update
    self_._batch_call_watchers()
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/param/parameterized.py", line 2509, in _batch_call_watchers
    self_._execute_watcher(watcher, events)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/param/parameterized.py", line 2471, in _execute_watcher
    watcher.fn(*args, **kwargs)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/streams.py", line 777, in _watcher
    self.trigger([self])
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/streams.py", line 189, in trigger
    subscriber(**dict(union))
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 243, in refresh
    raise e
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 239, in refresh
    self._trigger_refresh(stream_key)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 257, in _trigger_refresh
    self.update(key)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 956, in update
    item = self.__getitem__(key)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 443, in __getitem__
    self.update_frame(frame)
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/bokeh/element.py", line 2014, in update_frame
    ranges = self.compute_ranges(self.hmap, key, ranges)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 614, in compute_ranges
    self._compute_group_range(group, elements, ranges, framewise,
  File "/home/user/.anaconda3/envs/holoviz_error/lib/python3.11/site-packages/holoviews/plotting/plot.py", line 862, in _compute_group_range
    filtered = [r for i, r in zip(ids, values[g]) if i not in prev_ids]
                                       ~~~~~~^^^
KeyError: 'factors'

compute_ranges looks to be the culprit.

Screenshots or screencasts of the bug in action

Image of the blank plots. There should be a scatter marker at (1, 1)

• I may be interested in making a pull request to address this

[hoxbro]

I think this can fixed by updating the errored line with: filtered = [r for i, r in zip(ids, values.get(g, [])) if i not in prev_ids]

You are welcome to submit a PR.