turtle.setundobuffer() function in Python

The turtle module provides turtle graphics primitives, in both object-oriented and procedure-oriented ways. Because it uses Tkinter for the underlying graphics, it needs a version of Python installed with Tk support.

turtle.setundobuffer()

This function is used to set or disable undobuffer. It takes the size parameter. If the size is an integer an empty undobuffer of a given size is installed. Size gives the maximum number of turtle-actions that can be undone by the undo() function. If the size is None, no undobuffer is present.

Syntax :

turtle.setundobuffer(size)

Below is the implementation of the above method with some examples :

Example 1 :

Python3

# importing package
import turtle

# check default value of undobuffer
print(turtle.undobufferentries())

# set undo buffer by 10 as value
turtle.setundobuffer(10)

# loop executes 50 times with
# turtle.forward(1) statement
# i.e; undobufferentries gives 50
for i in range(50):
      turtle.forward(1)

# but gives 10 as it is set already
print(turtle.undobufferentries())

Output :

0
10

Example 2 :

Python3

# importing package
import turtle

# print default value
print(turtle.undobufferentries())

# loop for motion
for i in range(50):

    # one statement increase the
    # undobuffer entries
    turtle.fd(1)

# print undobuffer entries ie; 50
# due to above loop with one statement
print(turtle.undobufferentries())

# set undobuffer to None
turtle.setundobuffer(None)

# print undobuffer entries
# i.e; value set by set undobuffer
print(turtle.undobufferentries())

Output :

0
50
0