To fill color between two vertical lines, use the following steps −
Using plt.subplots() method, create a figure and a set of subplots. This utility wrapper makes it convenient to create common layouts of subplots, including the enclosing figure object, in a single call.
To draw two vertical lines, initialize x = 3 and x = 5.
Using the created ax, axvspan would help to add vertical span(rectangle) across the axes.
This rectangle spans from xmin to xmax horizontally, and, by default, the whole Y-axis vertically.
To show the figure, use the plt.show() method.
import matplotlib.pyplot as plt fig, ax = plt.subplots() line1 = 3 # vertical x = 3 line2 = 5 # vertical x = 5 ax.axvspan(line1, line2, alpha=.5, color='green') plt.show()