19: Optimisation in python

Debug it

Below is some code that has been deliberately written in an inefficient way. 

The code is supposed to draw 50 smiley faces in random positions using turtle graphics

Challenges

1. Only import the random module once
   

   Hint: modules should only ever be imported once, usually at the top of your code

2. Take the definition of the face procedure out of the loop so it’s only defined once
   

   Hint: There is a loop that repeats 50 times to draw 50 faces. Currently, each time the loop repeats it will define the face procedure all over again. Move the procedure definition out of the loop. 

3. Create a new procedure called fill_circle to reduce the number of lines
   

   Hint: An important skill in optimising code is spotting repeated sections of code. The sections of code that draw the face and two eyes look very similar. You can replace these sections with a call to fill_circle

On the next page you’ll get some ideas for projects where you can use functions in your own projects

Page 1: Intro

Page 2: The theory: learn what you need to know as fast as possible.

Page 3: Try it: try out and adapt some working python code snippets.

Page 4: Debug it: Learn how to find and fix common mistakes.

Page 5: Extend it: Choose a project idea to use your newfound python skills.