Develop an interactive visualisation with altair

import pandas as pd
import numpy as np
import altair as alt
url = "https://gist.githubusercontent.com/seankross/a412dfbd88b3db70b74b/raw/5f23f993cd87c283ce766e7ac6b329ee7cc2e1d1/mtcars.csv"
cars = pd.read_csv(url)
cars.head()
model mpg cyl disp hp drat wt qsec vs am gear carb
0 Mazda RX4 21 6 160 110 3.9 2.62 16.46 0 1 4 4
1 Mazda RX4 Wag 21 6 160 110 3.9 2.875 17.02 0 1 4 4
2 Datsun 710 22.8 4 108 93 3.85 2.32 18.61 1 1 4 1
3 Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
4 Hornet Sportabout 18.7 8 360 175 3.15 3.44 17.02 0 0 3 2
chart = alt.Chart(cars)
cars_chart = chart.mark_point().encode(
    x = 'wt:Q',
    y = 'mpg:Q'
)
cars_chart
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