Matplotlib.axes.Axes.get_lines() in Python

Last Updated : 27 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_lines() Function

The Axes.get_lines() function in axes module of matplotlib library is used to return a list of lines contained by the Axes

Syntax: Axes.get_lines(self) Parameters: This method does not accept any parameters. Returns: This method return a list of lines contained by the Axes.

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

Python3

# Implementation of matplotlib function
from matplotlib import colors
from matplotlib.ticker import PercentFormatter
import numpy as np
import matplotlib.pyplot as plt


N_points = 100000
x = np.random.randn(N_points)
y = .4 * x + np.random.randn(100000) + 5
 
fig, ax = plt.subplots()
ax.hist2d(x, y, bins = 100,
          norm = colors.LogNorm(), 
          cmap ="Greens")

w = list(ax.get_lines())
if len(w)== 0:
    ax.text(-2, 8.5, 
            "No line contained by the Axes \n")
else:
    ax.text(-3, 8.5,
            "List of the lines contained by the Axes \n")
    x = 8.5
    for i in w:
        
        ax.text(-3, x-0.5, str(i))
        x-= 0.5

fig.suptitle('matplotlib.axes.Axes.get_lines() \
function Example', fontweight ="bold")

plt.show()

Output:

Example 2:

Python3

# Implementation of matplotlib function
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches


fig, ax = plt.subplots()
x, y = 10 * np.random.rand(2, 1000)
ax.plot(x, y, 'go', alpha = 0.2)

circ = mpatches.Circle((0.5, 0.5),
                       0.25,
                       transform = ax.transAxes,
                       facecolor ='blue',
                       alpha = 0.75)

ax.add_patch(circ)

w = list(ax.get_lines())

if len(w)== 0:
    ax.text(1, 8.5,
            "No line contained by the Axes \n")
    
else:
    ax.text(1, 8.5,
            "List of the lines contained by the Axes \n")
    x = 8.5
    
    for i in w:
        ax.text(1, x-0.5, str(i))
        x-= 0.5

fig.suptitle('matplotlib.axes.Axes.get_lines() \
function Example', fontweight ="bold")

plt.show()