Python Turtle Graphics Tutorial for Absolute Beginners Drawing a Spirographic

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http://youtube.com/watch?v=ogsRn1XSy5c

Learn programming in Turtle, a Python Library, in this 2 minute tutorial for beginners. Playing around with the Turtle library is a great way to practise the basics susch as variables, lists, looping, functions and more. • ————————————————————— • Drawing with Turtle - Spirographic • ————————————————————— • In this tutorial we will code this piece of art in turtle, which is a python library. • To use the turtle library start with ‘import turtle’ • For the background color we can use the turtle function • Set the background color to black • • Next we need to create the object turtle and store it in the variable ’t'. • • The colours red and dark red are used. We can define them here in a list • • Now as you saw in the animation. the code draws a line and then takes a turn • And then draws a line again. • Each line is drawn longer than the line before. • • We can use a for loop here and loop about 400 times with the range function • • With the forward function we draw a straight line. • The length of the line is defined by the value stored in the variable number • Since we are looping in the range from 0 to 400, we can re-use the variable for the length of the line • • Next we need to define the angle. • • If we enter 90 here, this loop would create a square. • • We don’t want to it to be a perfect corner, but slightly off so it creates the spiral effect • Finally spiral alternates between red and dark red • • In one iteration of the loop we want to use red, the next iteration dark red and keep alternating like that in each iteration. • • We defined a list with the colors • Red has an index number of 0 and dark red has an index number of 1 • So one iteration we need to pass the index number 0 and the next 1 • • We can do that by use the operator modulo, which is the percentage sign • • This operator returns the remainder of a division problem • • To show you how this works, lets visualise what the operator does • • If we want to divide 5 by 2 with the modulo, what python does is, it makes in this case groups of 2. • If it is no longer able to make a group of 2, it returns the remainder. In this case one • Here’s an example of 4 divided by 2 with the out come 0 • And here’s an example of 1 divided by 2 • • the modulo groups the input figure by 2 and if it cannot make a group of 2 anymore, then it returns the remainder • • That’s how we can switch back and forth between red and dark red • • Finally let write turtle.done() to keep the screen open after the code is done running. • And that’s it. • • 🦁 Who are you? • My name is Raza. I am 30. I am an IT - manager right now, but I’ve been an accountant for the majority of my career. • I’m in love with #Python :) • You can find me here: • 📷 Instagram: / razacodes • 📈 Twitter: / razacodes • ————————————————————————————— • Goals for 2021 • Training Python hours: 57/1000 • Python/Django Projects: 2/30 • Subscribers: 1999/10,000 • —————————————————————————————- • #100SecondsOfCode • #pythonforbeginners #programming

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