"""
Multiple Marks
==============
This example demonstrates creating a single chart with multiple markers
representing the same data.
"""
import altair as alt
from vega_datasets import data

stocks = data.stocks()

chart = alt.LayerChart(stocks).encode(
    x='date:T',
    y='price:Q',
    color='symbol:N'
).add_layers(
    alt.Chart().mark_point(),
    alt.Chart().mark_line()
)

Add example of multi-layer chart