0 Answer
You only need to use alt.ip on the fields where you want to change the default tooltip formatting:
import altair as alt
from vega_datasets import data
source = data.cars()
alt.Chart(source).mark_circle(size=60).encode(
x='Horsepower',
y='Miles_per_Gallon',
color='Origin',
tooltip=[
'Origin',
alt.Tooltip('Horsepower', format="$.3s", title="Valor")
]
)
And just a reminder to post a full minimal reproducible example with code and data for your next question.
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