Math functions

• Takes something in, does something to it, then returns the processed thing
  • Takes in one/multiple argument(s)
• Note: the concept of programming functions comes from math functions
  • Programming functions are more general, can take in more things than just math things

Lists

Creating lists

my_list = ["thing", 2, "thing other]
# initialise a list called "my_list" with contents thing, 2, and thing other

List indexing

my_list[0]
>>> "thing"

• Note: List indexing STARTS FROM ZERO

Adding things to lists

my_list.append(3)
# adds 3 to the end of the list
my_list.insert(0, "Sub to Sherman")
# inserts "Sub to Sherman" to the beginning of the list

• .append() adds things to the end
• .insert() adds things to a specific position

Removing things from lists

my_list.remove("thing")
# removes "thing" from my_list
my_list.pop(1)
# removes what is indexed at 1 from the list and returns it

Functions

Defining a function

def function_name(argument):
	do something(argument)

Calling a function

function_name(x)

Turtle

Initialising the turtle and the screen

import turtle
s = turtle.getscreen()
t = turtle.Turtle()

It is good practice to establish both of these at the start of each program.

Other commands in Turtle

For more information on Turtle, we recommend that you read the official Turtle documentation, or Google any specific questions you might have. Feel free to ask me (Daisy) any questions you might have about Turtle, although I cannot guarantee that I'll be able to answer them.

Project

Using Turtle, create the most impressive program. Your program must include the following elements: functions, lists, conditionals, loops, variables, and user input. The user must be able to control some aspect of the drawing (eg. colours used, thickness of lines…)

Upload the file of your final code to a folder in Google Drive and make the folder viewable by everyone, then post the link as a comment to the Google Classroom post.

Sample solution to the project

As the sample solution I created was rather long, I've decided to not attach it to today's post. Instead, it is viewable on our class GitHub repository. Note: some of the functions used here have not been covered in class, and the structure of the program is probably not as well thought out as it could be. If you find the code confusing, feel free to come to me (Daisy) at some point in class, and I'll do my best to talk you through it.