Matplotlib.axes.Axes.get_legend() in Python

Last Updated : 19 Apr, 2020

Matplotlib is a library in Python and it is numerical - mathematical extension for NumPy library. The Axes Class contains most of the figure elements: Axis, Tick, Line2D, Text, Polygon, etc., and sets the coordinate system. And the instances of Axes supports callbacks through a callbacks attribute.

matplotlib.axes.Axes.get_legend() Function

The Axes.get_legend() function in axes module of matplotlib library is used to return the Legend instance, or None if no legend is defined.

Syntax: Axes.get_legend(self) Parameters: This method does not accepts any parameters. Return: This function return the Legend instance, or None if no legend is defined.

Below examples illustrate the matplotlib.axes.Axes.get_legend() function in matplotlib.axes: Example 1:

Python3

# Implementation of matplotlib function  
import matplotlib.pyplot as plt
import numpy as np
   
fig, ax = plt.subplots()
ax.plot([1, 6, 3, 8, 34, 13, 56, 67], color ="green")

x = ax.get_legend()
text ="Legend is present"
if x == None:
    text ="No legend present"
    
ax.text(2.5, 60, text, fontweight ="bold")
fig.suptitle('matplotlib.axes.Axes.get_legend() function\
 Example\n', fontweight ="bold")
fig.canvas.draw()
plt.show()

Output:

Example 2:

Python3

# Implementation of matplotlib function
import matplotlib.pyplot as plt
 
fig, (ax, ax1) = plt.subplots(1, 2)
# axes1
line1, = ax.plot([1, 2, 3], label ="Line 1",
                 color ="black", linewidth = 4, 
                 linestyle =':')

line2, = ax.plot([3, 2, 1], label ="Line 2", 
                 color ="green",
                 linewidth = 4)
 
first_legend = ax.legend(handles =[line1], 
                         loc ='upper center')
 
ax.add_artist(first_legend)
 
ax.legend(handles =[line2], loc ='lower center')
ax.set_title("Without get_legend function")
# axes1
line1, = ax1.plot([1, 2, 3], label ="Line 1",
                  color ="black", linewidth = 4, 
                  linestyle =':')
line2, = ax1.plot([3, 2, 1], label ="Line 2",
                  color ="green",
                  linewidth = 4)
 
first_legend = ax1.legend(handles =[line1],
                          loc ='upper center')
 
ax1.add_artist(first_legend)
 
ax1.legend(handles =[line2], 
           loc ='lower center')
ax1.get_legend().set_visible(False)
ax1.set_title("Using get_legend function")
fig.suptitle('matplotlib.axes.Axes.get_legend()\
function Example\n', fontweight ="bold")
 
plt.show()