Turtle Programming in Python
“Turtle” is a Python feature like a drawing board, which lets us command a turtle to draw all over it! We can use functions like turtle.forward(…) and turtle.right(…) which can move the turtle around. Commonly used turtle methods are :
Method Parameter Description Turtle() None Creates and returns a new tutrle object forward() amount Moves the turtle forward by the specified amount backward() amount Moves the turtle backward by the specified amount right() angle Turns the turtle clockwise left() angle Turns the turtle counterclockwise penup() None Picks up the turtle’s Pen pendown() None Puts down the turtle’s Pen up() None Picks up the turtle’s Pen down() None Puts down the turtle’s Pen color() Color name Changes the color of the turtle’s pen fillcolor() Color name Changes the color of the turtle will use to fill a polygon heading() None Returns the current heading position() None Returns the current position goto() x, y Move the turtle to position x,y begin_fill() None Remember the starting point for a filled polygon end_fill() None Close the polygon and fill with the current fill color dot() None Leave the dot at the current position stamp() None Leaves an impression of a turtle shape at the current location shape() shapename Should be ‘arrow’, ‘classic’, ‘turtle’ or ‘circle’
Plotting using Turtle
To make use of the turtle methods and functionalities, we need to import turtle.”turtle” comes packed with the standard Python package and need not be installed externally. The roadmap for executing a turtle program follows 4 steps:
- Import the turtle module
- Create a turtle to control.
- Draw around using the turtle methods.
- Run turtle.done().
So as stated above, before we can use turtle, we need to import it. We import it as :
from turtle import * # or import turtle
After importing the turtle library and making all the turtle functionalities available to us, we need to create a new drawing board(window) and a turtle. Let’s call the window as wn and the turtle as skk. So we code as:
wn = turtle.Screen() wn.bgcolor("light green") wn.title("Turtle") skk = turtle.Turtle()
Now that we have created the window and the turtle, we need to move the turtle. To move forward 100 pixels in the direction skk is facing, we code:
We have moved skk 100 pixels forward, Awesome! Now we complete the program with the done() function and We’re done!
So, we have created a program that draws a line 100 pixels long. We can draw various shapes and fill different colors using turtle methods. There’s plethora of functions and programs to be coded using the turtle library in python. Let’s learn to draw some of the basic shapes.
Shape 1: Square
Shape 2: Star
Shape 3: Hexagon
Visit pythonturtle.org to get a taste of Turtle without having python pre-installed. The shell in PythonTurtle is a full Python shell, and you can do with it almost anything you can with a standard Python shell. You can make loops, define functions, create classes, etc.
You can access these codes for wonderful turtle programs here
Some amazing Turtle Programs
1. Spiral Square Outside In and Inside Out
2. User Input Pattern
3. Spiral Helix Pattern
4. Rainbow Benzene
Trees using Turtle Programming
This article is contributed by Amartya Ranjan Saikia. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to email@example.com. See your article appearing on the GeeksforGeeks main page and help other Geeks.
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