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.onrelease()
This function is used to bind fun to the mouse-button-release event on this turtle on canvas.
Syntax :
turtle.onrelease(fun, btn=1, add=None)
Parameters:
| Arguments     | Description                                                                                   |
| fun | a function with two arguments, to which will be assigned the coordinates of the clicked point on the canvas. |
| btn | number of the mouse-button defaults to 1 (left mouse button). |
| add | True or False. If True, new binding will be added, otherwise, it will replace a former binding |
Below is the implementation of the above method with an example :
Python3
# import package import turtle   # methods to action def fxn1(x,y):    turtle.fillcolor("blue") def fxn2(x,y):    turtle.fillcolor("white")       # set screen and turtle sc=turtle.Screen() sc.setup(400,300)   turtle.shape("turtle") turtle.turtlesize(2) turtle.speed(1)   # allow user to click for some action turtle.onclick(fxn1)   # allow user to release for some action turtle.onrelease(fxn2) |
Output :
Here we can find that :
- whenever the user click (yellow-colored dot on  arrow) on turtle it changes to the blue color, and
- after releasing (yellow dot disappears) from the screen it changes to white color.
