Functions Lab | Part II #

In this lab, we will deepen our understanding with a series of design challenges.

[0] Set up #

💻 Start by going into the unit folder.

cd ~/desktop/making_with_code/unit00_drawing/

💻 Then clone the lab

git clone https://github.com/the-isf-academy/lab_functions2.git

💻 Now that you have the lab, go into its folder.

cd lab_functions2

💻 Enter the Poetry Shell to start the lab. As a reminder, we will run this command at the start of each lab, but only when we are inside a lab folder.

poetry shell

👾 💬 Exiting the poetry shell
When you want to exit the shell, you can type exit or ^D

💻 Open the file:

code circle_patterns.py

Take a look at the code inside

from turtle import *

def filled_circle(circle_size,circle_color):
    fillcolor(circle_color)
    begin_fill()
    circle(circle_size)
    end_fill()

[Helpful Turtle Functions] #

Here are some helpful Turtle functions that may make this problem easier. You are not required to use all of these functions.

Function	Input	Example Use	Explanation
forward	amount	`forward(100)`	Moves the turtle forward by the specified amount
backward	amount	`backward(100)`	Moves the turtle backward by the specified amount
right	angle in degrees	`right(45)`	Turns the turtle clockwise by the specified angle
left	angle in degress	`left(45)`	Turns the turtle counter clockwise by the specified angle
color	colorname	`color('red')`	Sets the color for drawing. Use “red”, “black”, etc. Here’s a list of all the colors.
speed	number from 0-10	`speed(0)`	Determines the speed at which the turtle moves around the window. 1 for slowest, 3 for normal speed, 10 for fast, 0 for fastest.
pendown	None	`pendown()`	Puts down the turtle/pen so that it draws when it moves
penup	None	`penup()`	Picks up the turtle/pen so that it doesn’t draw when it moves
pensize	width	`pensize(4)`	Sets the width of the pen for drawing
setheading	angle	`setheading(90)`	Sets the pen to the 0th degree
circle	size	`circle(10)`	Sets the radius of the circle
goto	x, y	`goto(90,0)`	Moves turtle to a given coordinate
begin_fill	None	`begin_fill()`	Marks the start of the color fill
end_fill	None	`end_fill()`	Marks the end of the color fill
fillcolor	colorname	`fillcolor('purple')`	Sets the color of the fill
pencolor	colorname	`pencolor('purple')`	Sets the color of the pen
bgcolor	colorname	`bgcolor()`	Changes the background of the turtle screen
colormode	colorname	`colormode(255)`	Changes the turtle color to accept rgb colors. e.g. color(255,15,23)

[1] Circle Patterns #

This mini lab is designed to be a pick and choose adventure. The patterns below are in order of difficulty. It is up to you to choose patterns that are at an appropriate level of difficulty for you.

Each of the patterns rely on the filled_circle() function provided in the starter code.

👾 💬 Commenting Code
It can be incredibly useful to use comment code! Comments are useful for
leaving yourself notes
leaving others notes
isolating testing
# this is a comment
# print('hello')
In visual studio code, you can select one or multiple lines of code and press ⌘+? to comment or uncomment code.

Alternating Pattern #

💻 Code a function alternating_pattern(num_circles)

Example function call: alternating_pattern(5)

It takes num_circles as a parameter - this will change the amount of circles in the pattern
Hard code the 2 colors to alternate between
Hint: look at the conditionals lab

For an additional challenge:

add num_circle_size as a parameter - this will change the size of the circles in the pattern
- Example function call: alternating_pattern(5,200)

Bullseye #

💻 Code a function bullseye_pattern(num_circles, starting_circle_size)

Example function call: bullseye_pattern(5, 200)

It takes num_circles and starting_circle_size as parameters - the number of circles and the size of the bullseye should adjust accordingly
Hard code the 2 colors to alternate between

For an additional challenge:

add color1 and color2 as parameters - this will change the colors of the pattern.
- Example function call: bullseye_pattern(5, 200, 'coral', 'light blue')

Size Pattern #

💻 Code a function size_pattern(num_columns, num_rows, color)

Example function call: size_pattern(6,5,'coral')

It takes num_columns, num_rows, and color as parameters

Half-tone Pattern #

💻 Code a function halftone_pattern(num_columns, num_rows, color1, color2)

Example function call: halftone_pattern(6,5,'dark blue','light blue')

It takes num_columns, num_rows, color1, and color2 as parameters

Random Pattern #

💻 First, code a function thick_circle(circle_size, circle_color, thickness)

It should draw a circle of any color, size, and any pen thickness

💻 Second, code a function random_pattern(num_circles, background_color)

Example function call: random_pattern(20,'black')

It should create a random pattern of thick circles and filled circles
The circles should all be of random colors and sizes.

This will require you to:

use the randint() function from the random library
- add from random import randint to the top of your file
change the color mode to accept rgb colors
- add colormode(255) to the start of the function

[2] Deliverables #

⚡✨
☑️ At then end of class, be sure to fill out this Google form.
✏️ Add a screenshot of a code snippet to your CS9 Lab Code Log in your Google Drive. Add a comment with a key takeaway, a question about your code, or describing a piece of code you are proud of.