turtle.setundobuffer() function in Python

23 Sep turtle.setundobuffer() function in Python

Posted at 11:37h in Python Turtle by Studyopedia Editorial Staff 0 Comments

The turtle.setundobuffer() function sets the size of the undo buffer. A larger size allows more actions to be undone. Set to None to disable the undo buffer.

Syntax: turtle.setundobuffer(size)
Parameters: size – an integer (the maximum number of undo entries) or None.

Let us see an example to implement the turtle.setundobuffer() function in Python:

Demo63.py

# turtle.setundobuffer() function in Python
# Code by Studyopedia

import turtle

window = turtle.Screen()
t = turtle.Turtle()

t.setundobuffer(10)  # Set undo buffer size to 10 entries

for i in range(15):
    t.forward(10)
    t.left(10)

entries = t.undobufferentries()
print("Undo buffer entries:", entries)

window.exitonclick()

The following is the output:

turtle.setundobuffer() function in Python

In the above code, we followed the below steps:

Import module: import turtle loads the turtle graphics library.
Create screen: window = turtle.Screen() opens the drawing window.
Create turtle: t = turtle.Turtle() creates the turtle you’ll control.
Set undo buffer size:setundobuffer(10) limits the turtle’s undo history to the 10 most recent undoable actions. Older actions are discarded once the buffer is full.
Draw with small steps:
for i in range(15): repeats the block 15 times.
forward(10) moves forward 10 units each iteration.
t.left(10) turns left by 10° each iteration.
This produces many undoable actions, exceeding the buffer size, so only the most recent 10 actions are retained.
Get undo buffer entries: entries = t.undobufferentries() returns how many actions are currently stored in the undo buffer (it will cap at 10 given the buffer size).
Print entries: print(“Undo buffer entries:”, entries) outputs the count to the console.
Close on click:exitonclick() waits for a mouse click, then closes the window.