Python - turtle.done()

turtle.done() starts the event loop in Turtle graphics by calling Tkinter’s main loop. Placed at the end of a program, it keeps the window open and responsive. It takes no arguments and should not be used in IDLE’s -n (No subprocess) mode.

Syntax

turtle.done() 

• Parameters : None 
• Returns : None 

Examples

Example 1 : At the end.

import turtle

# simple motion
turtle.forward(100)
turtle.right(90)
turtle.forward(100)

# stop execution and keep window open
turtle.done()

Output : 
 

Explanation: The turtle moves forward 100 units, turns 90°, moves another 100 units, and then turtle.done() keeps the window open so the user can view the drawing.

Example 2 : Stop the execution at any step. 

import turtle

# some motions
turtle.circle(20)
turtle.circle(30)

# stop execution
turtle.done()

# further motions (will not execute)
turtle.circle(40)
turtle.circle(50)

Output : 

Explanation: After turtle.done(), the turtle graphics program stops execution. Any code written after turtle.done() will not run, ensuring the drawing window stays open without further motion.