Does Hovertool/tooltip work with pandas df or only with ColumnDataSource

Question

Pretty new to Bokeh. Plotting a barplot (after importing pandas_bokey) works well. But... I want to change the hoover tooltips. Question: should hoover tooltip work with a pandas df in Bokeh or must ColumnDataSource be used? thanks

Answer 1

One option in pandas_bokeh to modify the HoverTool is passing a custom string to hovertool_string.

import pandas as pd
import pandas_bokeh

from bokeh.plotting import output_notebook
output_notebook()

df = pd.DataFrame({'a':[1,2], 'b':[3,4]})
df.plot_bokeh.bar(hovertool_string=r"""At index @{__x__values}: a is @{a} and b is @{b}""")

default output	modified tooltop

To see a more complex example check the 2. example in the line plot documentation

Comment

Because your question is very open, I am not sure if the answer is satisfying. Please provide some Minimal Working Example and some example data in future.