Submit a well-formatted pull request to our class blog with embedded Trinket programs for the below exercises. Complete these on your own, using any materials you need. Do not look at other students’ submissions until after you’ve completed your work.

Note: For this exercise, embed both the original program and your refactor of it in the post. See below for instructions on duplicating your trinkets

After your programs are done, check other students’ work and other resources online if you had questions. Include a reflection about what you think you’ve learned and any concepts that are still fuzzy to you. Did you encounter frustrating situations? Did you feel a lightbulb turn on?

Choose a previous Turtle program you’ve made and refactor it to use at least two custom functions (i.e. made by you using the def keyword, not built-in). At least one of these functions should take arguments and at least one should return something.

For bonus karma points, use some functions you have to import from the random or math modules.

WHen choosing a turtle program, one that has lots of repetitive code with slight variations is a good candidate. For instance, a program that goes to many x,y coordinates and draws a circle would be a good fit to get re-written using this function:

def go_draw_circle(x, y):
    tina.penup()
    tina.goto(x,y)
    tina.circle(10)
    tina.pendown()

You have considerable discretion in what gets parameterized in your function. Parameterization is the abstract concept of making something a function of an input, or parameter. Specifically, ‘arguments’ are parameters to ‘functions’ in Python. For example, my function always draws size 10 circles. I could re-write it with circle size as an argument to the function and have control over that:

def go_draw_circle(x, y, size):
    tina.penup()
    tina.goto(x,y)
    tina.circle(size)
    tina.pendown()

Don’t make an entirely new trinket or dramatically expand on what your trinket does. We’ll do more of that later.

Trinket Duplication

In trinket, you can Duplicate the trinket you want to refactor using the Duplicate button: