Python playground : geeky projects for the curious programmer / by Mahesh Venkitachalam.

Title:

Author:

Venkitachalam, Mahesh,

ISBN:

9781718503045

1718503040

Edition:

2nd edition.

Publication Info:

San Francisco :

Description:

xxvi, 414 pages : illustrations ; 24 cm

Contents:

Introduction -- Part I: Warming up. The Koch snowflake -- Spirographs -- Part II: Simulating life. Conway's game of life -- Musical overtones with Karplus-Strong -- Flocking Boids -- Part III: Fun with images. ASCII art -- Photomosaics -- Autostereograms -- Part IV: Enter 3D. Understanding OpenGL -- Conway's game of life on a torus -- Volume rendering -- Part V: Hardware hacking. Karplus-Strong on a Raspberry Pi Pico -- Laser audio display with a Raspberry Pi -- IoT garden -- Audio ML on Pi -- Appendix A: Python installation -- Appendix B: Raspberry Pi setup.

Summary:

"Harness the power of Python as you turn code into tangible creations with Python Playground, a collection of 15 inventive projects that will expand your programming horizons, spark your curiosity, and elevate your coding skills. Go beyond the basics as you write programs to generate art and music, simulate real-world phenomena, and interact with hardware, all through the use of Python and common libraries such as numpy, matplotlib, and Pillow. New to this edition: We've expanded your playground with five new projects: you'll draw fractals, bring Conway's Game of Life into 3D space, and use a Raspberry Pi and Python to create a musical instrument, an IoT garden monitor, and even a machine learning-driven speech recognition system. Whether you're a seasoned professional or just getting started, you'll find Python Playground to be a great way to learn, experiment with, and master this versatile programming language. Covers Python 3.x"--Page 4 of cover.

General Note:

Includes index.

Subject(s):

Python (Computer program language)

Computer software -- Development.

Holds: Copies (not including on-order items):

Available:*

Library	Material Type	Call Number	Shelf Location	Status	Item Holds
Searching... Distribution Facility	Book	005.133 PYTH 2023	New Books	Searching... Unknown	Searching... Unavailable
Searching... Library 21c	Book	005.133 PYTH 2023	New Books	Searching... Unknown	Searching... Unavailable

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Summary

Python is a powerful programming language that's easy to learn and fun to play with. But once you've gotten a handle on the basics, what's next? Python Playground, 2nd Edition is a collection of imaginative programming projects that will inspire readers to use Python for making art and music, simulating real-world phenomena, and interacting with hardware. This second edition is fully updated to be even more user friendly and features five brand-new projects, like transforming a Raspberry Pi Pico into a playable instrument, creating an IoT system to monitor your garden, and using machine learning to develop a speech-recognition system. Programming shouldn't be a chore, so have some geeky fun with Python Playground, 2nd Edition!

Author Notes

Mahesh Venkitachalam is a computer graphics and embedded systems consultant with over 20 years of experience. He is also the founder of Electronut Labs, a company known for developing innovative open source hardware.

Acknowledgments	xix
Introduction	xxi
Who Is This Book For?	xxii
What's in This Book?	xxii
What's New to the Second Edition?	xxiii
Why Python?	xxiv
The Code in This Book	xxvi
Part I Warming Up	1
1 The Koch Snowflake	3
How It Works	4
Using Recursion	4
Computing the Snowflake	5
Drawing with turtle Graphics	9
Requirements	11
The Code	11
Calculating the Points	11
Recursing	12
Drawing a Flake	13
Writing the main() Function	13
Running the Snowflake Code	14
Summary	15
Experiments!	15
The Complete Code	16
2 Spirographs	19
How It Works	20
Understanding Parametric Equations	20
Drawing Curves with turtle Graphics	24
Requirements	25
The Code	25
Drawing the Spiros	25
Coordinating the Animation	29
Saving the Curves	32
Parsing Command Line Arguments and Initialization	33
Running the Spirograph Animation	34
Summary	36
Experiments!	36
The Complete Code	36
Part II Simulating Life	43
3 Conway's Game of Life	45
How It Works	46
Requirements	48
The Code	49
Representing the Grid	49
Setting the Initial Conditions	50
Enforcing the Boundary Conditions	51
Implementing the Rules	51
Sending Command Line Arguments to the Program	52
Initializing the Simulation	53
Running the Game of Life Simulation	54
Summary	55
Experiments!	55
The Complete Code	56
4 Musical Overtones with Karplus-Strong	59
How It Works	62
The Simulation	62
The WAV File Format	64
The Minor Pentatonic Scale	65
Requirements	66
The Code	66
Implementing the Ring Buffer with deque	66
Implementing the Karplus-Strong Algorithm	67
Writing a WAV File	69
Playing WAV Files with pyaudio	69
Creating Notes and Parsing Arguments	71
Running the Plucked String Simulation	73
Summary	74
Experiments!	74
The Complete Code	74
5 Flocking Boids	79
How It Works	80
Requirements	80
The Code	81
Initializing the Simulation	81
Setting Boundary Conditions	83
Drawing a Boid	84
Applying the Rules of the Boids	86
Influencing the Simulation	91
Incrementing the Simulation	92
Parsing Arguments and Instantiating the Boids	94
Running the Boids Simulation	94
Summary	95
Experiments!	95
The Complete Code	96
Part III Fun with Images	99
6 ASCII Art	101
How It Works	102
Requirements	104
The Code	104
Defining the Grayscale Levels and Grid	104
Computing the Average Brightness	105
Generating the ASCII Content from the Image	106
Creating Command Line Options	107
Writing the ASCII Art Strings to a Text File	107
Running the ASCII Art Generator	108
Summary	108
Experiments!	108
The Complete Code	109
7 Photomosaics	113
How If Works	114
Splitting the Target Image	115
Averaging Color Values	115
Matching Images	116
Requirements	119
The Code	119
Reading In the Input Images	119
Calculating the Average Color Value of an Image	120
Splitting the Target Image into a Grid	120
Finding the Best Match for a Tile	121
Creating an Image Grid	123
Creating the Photomosaic	124
Writing the main() Function	126
Running the Photomosaic Generator	127
Summary	129
Experiments!	129
The Complete Code	129
8 Autostereograms	135
Haw It Works	136
Perceiving Depth in an Autostereogram	137
Working with Depth Maps	138
Shifting Pixels	140
Requirements	141
The Code	141
Creating a Tile from Random Circles	142
Repeating a Given Tile	143
Creating Autostereograms	144
Providing Command Line Options	145
Running the Autostereogram Generator	146
Summary	147
Experiments!	147
The Complete Code	147
Part IV Enter 3D	151
9 Understanding Opengl	153
How OpenGL Works	154
Geometric Primitives	155
3D Transformations	156
Shaders	158
Vertex Buffers	160
Texture Mapping	160
The OpenGL Context	161
Requirements	162
The Code	162
The Render Window Class	162
The Scene Class	165
Utility Functions	170
Running the OpenGL Application	171
Summary	171
Experiments!	171
The Complete Code	172
10 Conway's Game of Life on a Torus	179
How It Works	180
Computing Vertices	180
Computing Normals for Lighting	183
Rendering	183
Coloring the Triangle Strips	185
Controlling the Camera	185
Mapping the Grid to the Torus	187
Requirements	187
The Code	188
Rendering the Torus	188
Implementing the Game of Life Simulation	196
Creating the Camera	197
Putting Everything Together	198
Running the 3D Game of Life Simulation	201
Summary	203
Experiments!	203
The Complete Torus Rendering Code	203
The Complete Game of Life Simulation Code	209
The Complete Camera Code	211
The Complete RenderWindow Code	211
11 Volume Rendering	215
How It Works	216
The Data Format	217
Ray Generation	217
The OpenGL Window	220
Requirements	220
The Code	221
Generating a 3D Texture	221
Generating Rays	223
Implementing the Ray Casting Algorithm	229
Showing 2D Slices	233
Putting the Code Together	238
Running the Program	239
Summary	240
Experiments!	240
The Complete 3D Texture Code	241
The Complete Ray Generation Code	242
The Complete Volume Ray Casting Code	248
The Complete 2D Slicing Code	251
The Complete Main File Code	254
Part V Hardware Hacking	257
12 Karplus-Strong on a Raspberry Pi Pico	259
How It Works	260
Input and Output	261
The 12S Protocol	262
Requirements	263
Hardware Setup	263
MicroPython Setup	266
The Code	266
Setting Up	266
Generating the Notes	267
Playing a Note	269
Writing the main() Function	270
Running the Pico Code	272
Summary	273
Experiments!	273
The Complete Code	275
13 Laser Audio Display with a Raspberry Pi	279
How It Works	280
Generating Patterns with a Laser	281
Analyzing Audio with the Fast Fourier Transform	286
Requirements	288
Setting Up the Raspberry Pi	289
Constructing the Laser Display	289
Hooking Up the Hardware	291
The Code	293
Setting Up	293
Controlling the Hardware	294
Processing the Audio	296
Testing the Motors	300
Putting It All Together	301
Running the Laser Display	302
Summary	303
Experiments!	304
The Complete Code	305
14 IOT Garden	311
How It Works	312
Bluetooth Low Energy	313
The Bottle Web Framework	315
The SQLite Database	316
Requirements	317
Raspberry Pi Setup	318
CircuitPython Setup	318
If This Then That Setup	319
The Code	320
The CircuitPython Code	321
The BLE Scanner Code	325
The Web Server Code	331
The Main Program File	339
Running the IoT Garden	341
Summary	343
Experiments!	343
The Complete CircuitPython Code	343
The Complete BLE Scanner Code	345
The Complete Python Web Server Code	349
The Complete Main Program Code	351
15 Audio ML on PI	355
A Machine Learning Overview	356
How It Works	358
Spectrograms	359
Inference on the Raspberry Pi	362
Requirements	364
The Code	365
Training the Model in Google Colab	365
Using the Model on the Raspberry Pi	376
Running the Speech Recognition System	386
Summary	388
Experiments!	388
The Complete Code	389
A Python Installation	395
Installing Source Code for the Book's Projects	395
Installing Python and Python Modules	396
Windows	396
MacOS	397
Linux	397
B Raspberry Pi Setup	399
Setting Up the Software	402
Testing Your Connection	402
Logging in to Your Pi with SSH	404
Installing Python Modules	404
Working Remotely with Visual Studio Code	404
Index	405

Available:*

Bound With These Titles

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Summary

Summary

Author Notes

Table of Contents