Can I plot a colorbar for a bokeh heatmap?

Question

Does bokeh have a simple way to plot the colorbar for a heatmap?

In this example it would be a strip illustrating how colors correspond to values.

Answer 1

Since other answers here seem very complicated, here an easily understandable piece of code that generates a colorbar on a bokeh heatmap.

import numpy as np
from bokeh.plotting import figure, show
from bokeh.models import LinearColorMapper, BasicTicker, ColorBar


data = np.random.rand(10,10)

color_mapper = LinearColorMapper(palette="Viridis256", low=0, high=1)

plot = figure(x_range=(0,1), y_range=(0,1))
plot.image(image=[data], color_mapper=color_mapper,
           dh=[1.0], dw=[1.0], x=[0], y=[0])

color_bar = ColorBar(color_mapper=color_mapper, ticker= BasicTicker(),
                     location=(0,0))

plot.add_layout(color_bar, 'right')

show(plot)