Python with Turtle - Read the Docs
•The first line ‘from turtle import *’, tells the Python to import the turtle library in the Python shell This library contains all the functions e g ‘goto’ in the listing •The ‘goto’ command of Turtle-library is used in Line 2 It tells the turtle to goto to location (100, 0)
Turtle (Scratch with Python)
Turtle (Scratch with Python) The turtle module allows you to easily make drawings in Python It’s about giving orders to a turtle with simple instructions like “go ahead”, “turn” It’s the same principle as with Scratch, but with one difference: you no longer move blocks, instead you write the instructions Lesson 1 (The Python
Python Turtle Graphics – The Complete Guide
Python Turtle Graphics Window The background color of the turtle window is black but there is no turtle because the default color of the turtle is black Note : The screen bgcolor() method accepts one argument which is the color of the turtle window as a string The default color of Python turtle window is white
Chapter 13 Turtle Graphics - WSU
turtle graphics is fun and it enables you to use Python to be visually creative 13 2 Turtle Basics Among other things, the methods in the turtle module allow us to draw images The idea behind the turtle part of “turtle graphics” is based on a metaphor Imagine you have a turtle on a canvas that is holding a pen
Python Turtle cheat sheets - Columbus State University
Python Turtle Cheat Sheets Movement Some other useful commands Getting ready to draw import turtle Make all the turtle commands available to your program turtle mode(‘logo’) Set the mode turtle speed(integer) Set the animation speed of the turtle 1 = slowest, 10 = fastest 0 turns off animation completely turtle shape(‘turtle’) Set the
Lesson 16: Keyboard Control (Function - Python for Kids
does happen, they spring into action, doing whatever is necessary to handle the event Python’s turtle module includes some functions for handling user events, including mouse clicks and keypresses Now investigate the Turtle module function: wn onkeypress() or shortly wn onkey()
Intro to Python Graphics - NYU Computer Science
Turtle Graphics Turtle graphics is a method of programming “vector” graphics using a relative cursor upon a Cartesian plane Python has a built in module that supports turtle graphics called the “turtle” module Importing this module gives you access to all the turtle graphics functions you will need to
FOR KIDSFOR KIDS
Using Python’s turtle Module A module in Python is a way of providing useful code to be used by another program (among other things, the module can contain functions we can use) We’ll learn more about modules in Chapter 7 Python has a special module called turtle that we can use to learn how computers draw pictures on a screen
Starting Python and Turtle - WordPresscom
See if you find the guide to Turtle in the help (hint – look underHelp Python Docs Then click on ‘Global Module Index’ and search for Turtle 4 Making Python Say Hello It’s traditional for computer hackers to write a Hello World program when they’re getting started Type the following, then press enter (the big key on the
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Turtle (Scratch with Python)The?module allows you to easily make drawings in?. It"s about giving orders to a
turtle with simple instructions like "go ahead", "turn"... It"s the same principle as withScratch, but
with one difference: you no longer move blocks, instead you write the instructions.Lesson 1(The?turtle).
Turtle is the ancestor ofScratch! In a few lines you can make beautiful drawings. ???Here is a list of the main commands, accessible after writing: •advances a number of steps •?goes backwards •??turns to the right (without advancing) at a given angle in degrees •?turns leftTURTLE(SCRATCH WITHPYTHON)2•?points turtle in a direction (0=right,90=top,90=bottom,180=
left) •????moves to the point(x,y) •changes the value of the abscissa •changes the value of the ordinate •?sets the pen down •????sets the pen up •?changes the thickness of the line •changes the color:,??,?,???,???... •returns the(x,y)position of the turtle •????returns the directionto which the turtle is pointing returns the angle between the horizontal and the segment starting at the turtle and ending at the point(x,y) •???ends the program as soon as you click The default screen coordinates range from475to+475forxand from400to+400fory;(0,0)is in the center of the screen.xy400300200100100200300400
300200100100200300
(0,0)Activity 1(First steps).Goal: create your first drawings.
Trace the first letters of?, for example as below.TURTLE(SCRATCH WITHPYTHON)3Activity 2(Figures).
Goal: draw geometric shapes.1.Pentagon.Draw a first pentagon (in blue). You have to repeat5times: advance100steps, turn72
degrees.Hint.To build a loop, use
(even if you do not use the variable?).2.Pentagon (bis).
Define a variable?which is equal to200and a variablewhich is equal to72degrees. Draw a second pentagon (in red), this time advancing by?and turning by.3.Dodecagon.Draw a polygon having 12 sides (in purple).
Hint.To draw a polygon withnsides, it is necessary to turn an angle of 360=ndegrees.4.Spiral.Draw a spiral (in green).
Hint.Build a loop, in which you always turn at the same angle, but you move forward by a length that increases with each step.Activity 3(Function graph).Goal: draw the graph of a function.
TURTLE(SCRATCH WITHPYTHON)4Plot the graph of the square function and the sine function. In order to get a curve in the turtle window, repeat forxvarying from200 to+200: set y=1100 x2, go to (x,y).For the sinusoid, you can use the formula
y=100sin120 x .By default?does not know the sine function, to useyou must first import the????module:To make the turtle move faster, you can use the command?.Activity 4(Sierpinski triangle).
Goal: trace the beginning of Sierpinski"s fractal by nesting loops.Here is how to picture the second drawing. Analyze the nesting of the loops and draw the next pictures.
TURTLE(SCRATCH WITHPYTHON)5
TURTLE(SCRATCH WITHPYTHON)6Activity 5(The heart of multiplication tables).Goal: draw the multiplication tables.We set an integern. We are studying the2table, that is to say we calculate20,21,22, up to
2(n1). In addition, the calculations will be modulon. We therefore calculate
2k(modn)fork=0,1,...,n1
How do we draw this table?
We placenpoints on a circle, numbered from0ton1. For eachk2 f0,...,n1g, we connect the point numberkwith the point number 2k(modn)by a segment. Here is the layout, from the table of 2, modulon=10.0123 4 5 6 789For example:
the 3 point is linked to the 6 point, because 2 3=6; the 4 point is linked to the 8 point, because 2 4=8; the 7 point is linked to the 4 point, because 2 7=14=4(mod 10). Draw the table of 2 modulon, for different values ofn.Here is what it gives forn=100.
TURTLE(SCRATCH WITHPYTHON)7Hints.For calculations modulon, use the expression ? ?.Here"s how to get the coordinates of the vertices. This is done with the sine and cosine functions (available
from the????module). The coordinates(xi,yi)of the vertex numberi, can be calculated by the formula: xi=rcos2in andyi=rsin2inThese points will be located on a circle of radiusr, centered at(0,0). You will have to chooserrather
large (for exampler=200).xy (x0,y0)(x1,y1)(xn1,yn1)(xi,yi)x i=rcos2in y i=rsin2in (0,0)rLesson 2(Several turtles).
Several turtles can be defined and move independently. Here"s how to define two turtles (one red and one blue) and move them.TURTLE(SCRATCH WITHPYTHON)8
Activity 6(The pursuit of turtles).Goal: draw tracking curves.
Program four turtles running one after the other:•turtle 1 runs after turtle 2, turtle 2 runs after turtle 3, turtle 3 runs after turtle 4, turtle 4 runs after turtle 1. Here are the starting positions and orientations:turtle 1turtle 4turtle 3 turtle 2 TURTLE(SCRATCH WITHPYTHON)9Hints.Use the following piece of code: •You place turtles at the four corners of a square, for example at(200,200),(200,200), (200,200)and(200,200). Y ouget the position of the first turtle by using ???? ? ???. Same for the other turtles. You calculate the angle between turtle 1 and turtle 2 by the command? ? Y ouorient the first turtle according to this angle: ?.Y ouadvance the first turtle by 10 steps.
Improve your program by drawing a segment between the chasing turtle and the chased turtle each time.
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