To retrieve colorbar instance from figure in matplotlib, we can use imshow scalar mappable object in colorbar to retrieve colorbar instance.
Steps
Get random data with 10×10 dimension of array, data points between -1 to 1.
Use imshow() method to display data as an image, i.e., on a 2D regular raster.
Create a colorbar for a ScalarMappable instance, *mappable*, with imshow() object.
To display the figure, use show() method.
Example
import numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True data = np.random.randint(-1, 1, (10, 10)) im = plt.imshow(data, interpolation="nearest") cbar = plt.colorbar(im) plt.show()