How to retrieve colorbar instance from figure in Matplotlib?

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()

Output