hvplot.show fails with panel reactive object

[ZhaJiMan]

ALL software version info

Software Version Info

windows==11
python==3.13.5
hvplot==0.12.0
holoviews==1.21.0
panel==1.7.5
bokeh==3.7.3
numpy==2.2.6
pandas==2.3.1

Description of expected behavior and the observed behavior

When attempting to display a plot generated from pn.rx object using hvplot.show() in a python script, an ValueError is raised, indicating that the object type is not recognized. Additionally, the error message itself (ValueError: {type(obj).__name__} type object not recognized and cannot be shown) is not a f-string.

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

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

pn.extension(throttled=True)

df = pd.DataFrame({'value': np.linspace(0, 1, 100)})
rdf = pn.rx(df)

slider = pn.widgets.FloatSlider(name='value', start=0, end=1, value=0.5)
subset = rdf[rdf > slider]
plot = subset.hvplot(y='value')
hvplot.show(plot)

Stack traceback and/or browser JavaScript console output

(base) PS D:\holoviz> python test.py
Traceback (most recent call last):
  File "D:\holoviz\test.py", line 14, in <module>
    hvplot.show(plot)
    ~~~~~~~~~~~^^^^^^
  File "D:\programming\uv_base\.venv\Lib\site-packages\hvplot\utilities.py", line 134, in show
    raise ValueError('{type(obj).__name__} type object not recognized and cannot be shown.')
ValueError: {type(obj).__name__} type object not recognized and cannot be shown.

Screenshots or screencasts of the bug in action

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

[holovizbot]

This issue has been mentioned on HoloViz Discourse. There might be relevant details there:

https://discourse.holoviz.org/t/hvplot-interactive-vs-pn-rx-recommendation-for-new-code/8903/3

[ahuang11]

With

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

pn.extension(throttled=True)

df = pd.DataFrame({'value': np.linspace(0, 1, 100)})
rdf = pn.rx(df)

slider = pn.widgets.FloatSlider(name='value', start=0, end=1, value=0.5)
subset = rdf[rdf > slider]
plot = subset.hvplot(y='value')
plot.show()

I still get:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[2], line 14
     12 subset = rdf[rdf > slider]
     13 plot = subset.hvplot(y='value')
---> 14 plot.show()

File ~/miniconda3/envs/lumen/lib/python3.12/site-packages/param/reactive.py:1077, in rx.__getattribute__(self, name)
   1075         pass
   1076     return new
-> 1077 return super().__getattribute__(name)

AttributeError: 'rx' object has no attribute 'show'

Is that expected?

[maximlt]

Holoviews objects don't have a show method.