hv.help errors on object created using hvplot: AttributeError: 'NoneType' object has no attribute 'registry'

[MarcSkovMadsen]

I'm trying to add tooltips for hvplot in holoviz/hvplot#789. As a part of would like to use hv.help to demonstrate how easy it is to drop into HoloViews for more power and flexibility. But it seems its not that easy.

import pandas as pd, numpy as np
import hvplot.pandas

idx = pd.date_range('1/1/2000', periods=1000)
df  = pd.DataFrame(np.random.randn(1000, 4), index=idx, columns=list('ABCD')).cumsum()
curves = df.hvplot()

import holoviews as hv
hv.extension("bokeh")
hv.help(curves)

$ python 'script.py'
Traceback (most recent call last):
  File "script.py", line 10, in <module>
    hv.help(curves)
  File "C:\Users\masma\Anaconda3\envs\hvplot_dev\lib\site-packages\holoviews\__init__.py", line 81, in help
    recursive=recursive, pattern=pattern, elements=elements_list)
  File "C:\Users\masma\Anaconda3\envs\hvplot_dev\lib\site-packages\holoviews\core\options.py", line 1239, in info
    pattern=pattern, elements=elements)
  File "C:\Users\masma\Anaconda3\envs\hvplot_dev\lib\site-packages\holoviews\core\pprint.py", line 144, in info
    backend_registry = cls.store.registry.get(backend, {})
AttributeError: 'NoneType' object has no attribute 'registry'

I'm on the main branch of hvPlot and just installed latest version of HoloViews.

[maximlt]

I'm on the master branch of these two libraries and cannot reproduce this error, either by running the code in a notebook or as a script.

[hoxbro]

I cannot reproduce the issue. Feel free to open it if you are still having this problem.

[DylanTHebert]

This is old and maybe no longer relevant, but I've been struggling with this issue, the problem appears to be a missing dependency that comes with JupyterLabs, which I assume basically everyone normally installs and is why this wasn't able to be reproduced. I discovered this from the most recent reply on the following stack overflow post:

https://stackoverflow.com/questions/65191364/how-to-view-opts-for-holoviews-with-bokeh-in-python?newreg=782928f68c4d4bc994a07640ac4e6e48

I've been able to reproduce by starting a fresh env in python 3.9.7, installing holoviews 1.15.4, or 1.18 only via pip, and running the imports, set backend, and help command as done in the original question. Then installing jupterlab fixes the issue, but only on 1.15.4, it persists on 1.18 at least on python 3.9.

[TheoMathurin]

I can confirm I always get this error within a Python console. I don't have jupyterlab installed in my environments.

[way-zer]

I also encountered this problem, and a quick workaround:

add InfoPrinter.store=cls inside Store.info function before call InfoPrinter.info

When InfoPrinter.store init normally? I only found default value None

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.