[Python] Fill an area under a line in Python Bokeh

How to shade the area under a line in Bokeh?

I have a simple line plot as follows and I want to fill an under a line in a specified color.

import pandas as pd
from bokeh.io import output_file, curdoc
from bokeh.plotting import figure, show
from bokeh.models import ColumnDataSource

output_file("layout.html")


df = pd.DataFrame({'date': ["1-1-2019", "2-1-2019", "3-1-2019", "4-1-2019", "5-1-2019", "6-1-2019", "7-1-2019", "8-1-2019", "9-1-2019", "10-1-2019"],
'cost': [10, 15, 20, 30, 25, 5, 15, 30, 35, 25]})

fig = figure(x_axis_type="datetime", toolbar_location='above', plot_width=1500)

plot_source = ColumnDataSource(data=dict(date=pd.to_datetime(df["date"]),
cost=df["cost"]))

line_plot = fig.line("date", "cost", source=plot_source, line_width=2, color="#00CED1")

show(fig)


So it will look like a green area in the image below.



I checked Pathces glyph function however I am not clear about it. Appreciate any help!

Continue reading...