Matplotlib.artist.Artist.remove_callback() in Python
Matplotlib is a library in Python and it is numerical – mathematical extension for NumPy library. The Artist class contains Abstract base class for objects that render into a FigureCanvas. All visible elements in a figure are subclasses of Artist.
matplotlib.artist.Artist.remove_callback() method
The remove_callback() method in artist module of matplotlib library is used to add a callback function that will be called whenever one of the Artist’s properties changes.
Syntax: Artist.remove_callback(self, oid)
Parameters: This method accepts the following parameters.
- oid: This parameter is the observer id.
Returns: This method returns the remove a callback based on its observer id.
Below examples illustrate the matplotlib.artist.Artist.remove_callback() function in matplotlib:
Example 1:
import matplotlib.pyplot as plt
import numpy as np
import time
def update():
global timer
plt.get_current_fig_manager().canvas.figure.patch.set_facecolor( str (np.random.random()))
plt.draw()
def start_animation():
global it
timer = fig.canvas.new_timer(interval = 50 )
w = timer.add_callback(update)
timer.start()
timer.remove_callback(w)
it = 1
fig = plt.figure()
start_animation()
fig.suptitle('matplotlib.artist.Artist.remove_callback()\
function Example', fontweight = "bold" )
plt.show()
|
Output:
Example 2:
from random import randint, choice
import time
import matplotlib.pyplot as plt
import matplotlib.patches as patches
back_color = "black"
colors = [ 'red' , 'green' , 'blue' , 'purple' ]
width, height = 4 , 4
fig = plt.figure()
plt.xlim([ 0 , width])
plt.ylim([ 0 , height])
fig.canvas.draw()
it = 1
def update():
global it
x = randint( 0 , width - 1 )
y = randint( 0 , height - 1 )
arti = mpatches.Rectangle(
(x, y), 1 , 1 ,
facecolor = choice(colors),
edgecolor = back_color
)
fig.add_artist(arti)
fig.draw_artist(arti)
fig.canvas.blit(fig.bbox)
if it > 100 :
timer.remove_callback(w)
it + = 1
timer = fig.canvas.new_timer(interval = 1 )
w = timer.add_callback(update)
timer.start()
fig.suptitle('matplotlib.artist.Artist.remove_callback() \
function Example', fontweight = "bold" )
plt.show()
|
Output:
Last Updated :
10 May, 2020
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