/home/conda/scipy/669999b7-1720037067-35-hvplot-and-panel/lib/python3.10/site-packages/holoviews/core/data/pandas.py:260: FutureWarning: The default of observed=False is deprecated and will be changed to True in a future version of pandas. Pass observed=False to retain current behavior or observed=True to adopt the future default and silence this warning.
dataset.data.groupby(group_by, sort=False)]
I think groupby needs observed=False passed to suppress.
Another warning in the Plotting notebook: https://github.com/holoviz/holoviz/blob/main/examples/tutorial/02_Plotting.ipynb
I think groupby needs
observed=Falsepassed to suppress.