[ python ] interactive with altair

# test interactive chart in github blog

import polars as pl
import altair as alt

# make DatraFrame

---

df = pl.DataFrame( { 
    'a' : [ 1, 3 ,4 ], 
    'b' : [ 1, 3, 4 ],
    'c' : [ 3, 8, 4 ]
} )

# Visualiztion with altair