Matplotlib.axes.Axes.remove_callback() in Python

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.remove_callback() method

The remove_callback() method in axes module of matplotlib library is used to remove a callback based on its observer id.

Syntax: Axes.remove_callback(self, oid)

Parameters: This method accepts the following parameters.

• oid: This parameter is the observer id

Returns: This method does not returns any value,

Below examples illustrate the matplotlib.axes.Axes.add_callback() function in matplotlib:

Example 1:

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


def update():
    plt.get_current_fig_manager().canvas.figure.patch.set_facecolor(str(np.random.random()))
    plt.draw()
    print("Draw at time :", time.time())


def start_animation():

    timer = fig.canvas.new_timer(interval = 50)
    w = timer.add_callback(update)
    timer.start()
    timer.remove_callback(w)

fig, ax = plt.subplots()
start_animation()

ax.set_title('matplotlib.axes.Axes.remove_callback() \
function Example', fontweight ="bold")

plt.show()

Output:

Example 2:

# Implementation of matplotlib function
from random import randint, choice
import time
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches


back_color = "black"
colors = ['red', 'green', 'blue', 'purple']
width, height = 4, 4

fig, ax = plt.subplots()
ax.set(xlim =[0, width], ylim =[0, height])

fig.canvas.draw()
ll = 1

def update():
    global ll
    x = randint(0, width - 1)
    y = randint(0, height - 1)

    arti = mpatches.Rectangle(
        (x, y), 1, 1,
        facecolor = choice(colors),
        edgecolor = back_color
    )

    ax.add_artist(arti)

    ax.draw_artist(arti)

    fig.canvas.blit(ax.bbox)
    print("Draw at time :", time.time())

    if ll > 10:
        timer.remove_callback(w)
    ll += 1

timer = fig.canvas.new_timer(interval = 1)
w = timer.add_callback(update)
timer.start()

ax.set_title('matplotlib.axes.Axes.remove_callback()\
function Example', fontweight ="bold")

plt.show()

Output:

Draw at time : 1588597900.000635
Draw at time : 1588597900.047566
Draw at time : 1588597900.0787704
Draw at time : 1588597900.11001
Draw at time : 1588597900.1412835
Draw at time : 1588597900.1725228
Draw at time : 1588597900.2037697
Draw at time : 1588597900.2350247
Draw at time : 1588597900.2662778
Draw at time : 1588597900.2975273
Draw at time : 1588597900.313137