Stacked area chart

import easychart

# data is a pd.DataFrame with world population by continent
# in 1950, 2017, 2030, 2050 and 2100
data = easychart.datasets.load("populations")

chart = easychart.new()
chart.title = "Distribution of world population by continent"
chart.subtitle = "UN World Population Prospect (2017)"
chart.stacking = "percent"
chart.yAxis.labels.format = "{value}%"
chart.tooltip = ("shared", "{value:.1}%")
for column in data.columns[::-1]:
    chart.plot(data[column], index=data.index, type="area", marker=False)
chart.vband(
    2020,
    2100,
    color="rgba(200,200,200,0.2)",
    zIndex=20,
    label={"text": "forecast", "style": {"color": "white"}},
)
chart