CS 111 - Spring 2018

Sample Code

Note that this wiki attaches the Python programs as text files. You will need to change the filenames after downloaded to remove the .txt extension, or just cut and paste from the web page.

Sound Manipulation Code:

• lect0501b.py.txt - Create an echo for a sound
• selectionsort.py.txt - A slow sorting algorithm
• quicksort.py.txt - A fast sorting algorithm
• lect0501a.py.txt - Reversing a sound
• lect0426b.py.txt - Repeating a sound with varying the pitch based on values from a list
• lect0426a.py.txt - Code to change the pitch based on a parameter
• lect0424d.py.txt - Code to create a sine wave for a given frequency
• lect0424c.py.txt - Code to determine the frequency based on a character input for Project 4
• lect0424b.py.txt - Code to decrease the pitch of a sound (cut it in half)
• lect0424a.py.txt - Code to increase the pitch of a sound (double the pitch)
• lect0419d.py.txt - Joins two sounds together so they play in sequence
• lect0419c.py.txt - Creates a "sound byte" from an existing sound
• lect0419b.py.txt - Copies a sound
• lect0419a.py.txt - Repeating a sound X times (where X doesn't need to be an integer) - uses repeated subtraction to determine the remainder from integer division
• lect0417c.py.txt - Repeating a sound X times (where X doesn't need to be an integer) - uses the modulas operator, %, in calculation to determine remainder from integer division
• lect0417b.py.txt - Repeating a sound X times (where X must be an integer)
• lect0417a.py.txt - Maximizing the volume of a sound without losing any information - "Normalizing" the sound's volume
• lect0412c.py.txt - Function to Blend two sounds together (play at same time)
• lect0412b.py.txt - Function to Fade-in a sound
• lect0412a.py.txt - Same code as lect0403b.py but using a FOR LOOP
• lect0403b.py.txt - Function to double the "volume" of a sound
• lect0403a.py.txt - Select a sound file (.wav) from the computer and play it

• lect0322h.py.txt - Cropping a picture (using coordinates from blue background picture below)
• lect0322g.py.txt - Adding multiple pictures to an existing "canvas"
• lect0322f.py.txt - Adding a picture to an existing "canvas"
• lect0322e.py.txt - Merging multiple pictures one at a time to create a collage via a loop
• lect0322d.py.txt - Merging 3 pictures one at a time to create a collage prepping to use a loop
• lect0322c.py.txt - Merging 3 pictures one at a time to create a collage
• lect0322b.py.txt - Using the Make a Collage code to repeat a picture horizontally
• lect0322a.py.txt - Using the Make a Collage code to triplicate a picture
• lect0320e.py.txt - Make a Collage horizontally with two pictures
• lect0320d.py.txt - Chromakey code with offset to move foreground image (with green background)
• lect0320c.py.txt - Chromakey code with blue background. Using picture:
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• lect0320b.py.txt - Select and explore a picture
• lect0320a.py.txt - Chromakey (green-screen) code with green back ground. Using picture
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• lect0315f.py.txt - Resize picture code (can do both reduction and enlargement)
• lect0315e.py.txt - Enlarging a picture
• lect0315d.py.txt - Reducing a picture in size
• lect0315c.py.txt - Triplicating a picture with the middle picture mirrored
• lect0315b.py.txt - Triplicating a picture (having it appears 3 times in one picture)
• lect0315a.py.txt - Duplicating a picture
• lect0313d.py.txt - Edge Detection Code
• lect0313c.py.txt - Invert Picture both Top to Bottom AND Left to Right
• lect0313b.py.txt - Invert Picture Top to Bottom
• lect0313a.py.txt - Create a Mirror Image of a Picture (Invert Left to Right)
• lect0308d.py.txt - Function to rotate a picture 90 degrees
• lect0308c.py.txt - Function to flip a picture along its main diagonal
• lect0308b.py.txt - Function to superimpose 2 pictures into 1 picture
• lect0308a.py.txt - Code showing how to exit a program when encountering an error
• Picture used for code on 3/6/18
• 
• lect0306e.py.txt - Make grayscale picture except where picture is red
• lect0306d.py.txt - Red Eye Reduction Complete version 2
• lect0306c.py.txt - Red Eye Reduction Complete version 1
• lect0306b.py.txt - Using color distance function to determine if a pixel's color is close to red
• lect0306a.py.txt - Code to open and explore a picture
• lect0301e.py.txt - Four color posterization using if-then statements with the AND operator
• lect0301d.py.txt - Four color posterization using elif clauses within an if-else statement
• lect0301c.py.txt - Four color posterization using nested if-else statements
• lect0301b.py.txt - Two color posterization of magenta and green using if-else
• lect0301a.py.txt - Two color posterization of black and white ("Black OR White") using if-else
• lect0227e.py.txt - An better fake sunset (reduces the amount of green and blue at each pixel)
• lect0227d.py.txt - First attempt at a fake sunset (increases the amount of red at each pixel)
• lect0227c.py.txt - Brighten the color at each pixel (making the color closer to white)
• lect0227b.py.txt - Create a color negative from the original picture
• lect0227a.py.txt - Create a "gray-scale" (black and white) picture based on the perceived brightness/luminance at each pixel
• lect0220d.py.txt - Function to change a picture into (an inaccurate) black and white picture
• lect0220c.py.txt - Function to change all pixels in a picture to maximize the amount of red
• lect0220b.py.txt - Code to highlight the use of a nested while loop to access all pixels in a picture
• lect0220a.py.txt - Code to change all pixels in a picture to maximize the amount of red
• lect02015a.py.txt - Change one pixel near lower right corner of picture to red

• lect02013d.py.txt - Function to draw arc where turtle is returned to original starting position before arc is drawn.
• lect02013c.py.txt - Function to draw star of a given color, where pen color is restored to original pen color. Change to the pen is localized to the function
• lect02013b.py.txt - Function to draw star of a given color, but pen color extends outside of the function
• lect02013a.py.txt - Functions to the draw star and draw circle
• lect0208g.py.txt - Adding more circles to the design from lect0208f.py
• lect0208f.py.txt - Using the loop Counter variable to change to size of the circles drawn and the color of the circles drawn
• lect0208e.py.txt - Drawing multiple circles across the world using a loop
• lect0208d.py.txt - Drawing multiple circles highlighting the difference between the 2 different "reposition Turtle" functions
• lect0208c.py.txt - Drawing multiple circles showing similarities between the 2 different "reposition turtle" functions
• lect0208b.py.txt - Moving the code to reposition a turtle into a function, making main() easier to read
• lect0208a.py.txt - Drawing two circles with the reposition code between the two function calls
• lect0206d.py.txt - Code drawing multiple Circles and multiple hexagons
• lect0206c.py.txt - Code to draw multiple "Circles" - each circle is a 30 sided polygon
• lect0206b.py.txt - Code to draw multiple Octagons using a function
• lect0206a.py.txt - Code that opens a picture on the computer, draws on it, displays it, then saves the updated picture back on the computer
• lect0201h.py.txt - Code showing how to draw on a picture rather than a world
• lect0201f.py.txt - Drawing multiple hexagons of different sizes
• lect0201e.py.txt - Drawing multiple hexagon spun around from a central point
• lect0201d.py.txt - Modifying lect0201a.py to call the drawHex function
• lect0201c.py.txt - Modifying the drawHex function to include a length parameter
• lect0201b.py.txt - Drawing two hexagons using on "drawHex" functions
• lect0201a.py.txt - Drawing multiple hexagons with one loop nesting inside another loop
• lect0130d.py.txt - Drawing two hexagons using loops
• lect0130c.py.txt - Drawing a blue square without a loop, drawing a red hexagon with a loop
• lect0130b.py.txt - Drawing a blue square and a red hexagon
• lect0130a.py.txt - Drawing a blue square and a red triangle
• lect0125d.py.txt - Drawing 2 squares of different colors
• lect0125c.py.txt - Showing the difference in syntax between FUNCTIONS and METHODS
• lect0125b.py.txt - Drawing 2 squares using Turtles
• lect0125a.py.txt - Draw a square using a Turtle

• lect0118b.py.txt - Sample program with main( ) function
• lect0118a.py.txt - Sample python code
• template.py.txt - Template for Python programs