Kirk Kaiser - Make Art with Python: Programming for Creative People

If you want to build a ship, dont drum up the people to gather wood, divide the work, and give orders.
Instead, teach them to yearn for the vast and endless sea.

-Antoine De Saint-Exupery, The Little Prince

Face it, computers have taken over humanity.

Everyones face is buried in their phone, oblivious to the world. Weve collectively fallen in love with the worlds of the machines.

Because of this, the ability to write new software gives programmers unimaginable power over the collective minds of humanity. Through their programs, they magnify and multiply ideas, which can quickly spread to millions of people in days, weeks, months.

But the process of learning to program computers is treacherous. To the layperson, it seems as if only a mathematically minded people can ever hope to learn to program, and truly control a computer.

And sure, everyone who learns to program must deal with broken code libraries, finding an appropriate programming language, deciding what to make, and so on. There are so many decisions to make along the journey, and so many false starts, that most people give up before they even really begin.

But programming is especially rewarding for the type of people who are drawn to the humanities. They bring a unique perspective and experience to the world of computers we inhabit. They enrich the world of computation by bringing fun and stories and color to our virtual worlds.

And honestly, most great programmers are more like painters than technicians, beginning their software with sketches, tiny little programs that just do one thing, that let them see their ideas before beginning. Theyll often make mistakes, write things that dont run properly the first time. Eventually, through sheer force and trial and error, things pushed through to a clear idea.

And writing new programs isnt just for obedient rule followers. Anyone motivated enough can write their own programs, given the proper instruction and patience. Once you understand the fundamental concepts, playing with software becomes an opportunity to play with the flow of thought itself.

This book gives creative, intelligent people with ideas the mental tools to start programming computers and getting their ideas into the world. If youve never thought of yourself as the sort of person who could write a program, this is the book for you.

Almost everyone explores their ideas and shares their creativity through computers now. Why are so few people exploring new ideas with programming?

And why are even less people creating programs that are fun?

In this book, well focus on learning to program through art and the Python programming language.

To an outsider, art and programming couldnt be more different. One seems rigid, with precise instructions that are read by an unyielding machine, and the other is open to interpretation by error prone, emotional humans.

But the process of writing software is the same thing as the process of creating art. In each, we experiment, copy, explore, and then share what weve made. Art and programming are both mediums for exploring our ideas, and then sharing those ideas for other people to play with.

This book, however, isnt about art with a capital A. Were not making artwork fit for prestigious museums. Instead, this book is more like art with tiny a, as in arts and crafts, or better yet, finger painting. Were just here to enjoy ourselves, and the act of putting paint on paper. Or in this case, code on the computer.

Step by step, well make tiny, understandable changes to the code weve written, and reshape and mix ideas like Legos into new programs.

Well write programs for drawing, editing photos, and making infinitely repeating shapes.

By manually writing out and running each of these programs, youll get a feel for how to start exploring and solving problems on your own.

Were just using drawing and art as a medium, because with art were allowing ourselves to make mistakes and not be perfect.

To create our programs, well use the open-source Python interpreter.

Open source is a software movement created by a global community of programmers around the world. Each contributes their time and mind to create software, and then gives it away for free.

Each person may contribute just a little bit of a program, but collectively, the resource of open source software is what powers most of the web, from Facebook to Google, to all the servers in between.

Python is a programming language, but also a program that reads and runs programs. Python can load and run programs from files, or you can write code line by line, directly into it. Because Python reads your program line by line, its called an interpreter.

In this book, well use the main Python interpreter, also called Cython.

As an interpreter, Python reads our programs line by line executing each instruction in order from the files we write. Indeed, we can also type out our programs directly into Python, and have our programs run as we type. For a beginner, this makes starting with Python less frustrating, and makes making mistakes less costly.

Python has also been around for a long time, receiving decades of continuous improvements from some of the best programmers in the world. Because of this, its also got over a hundred thousand libraries, or programs which extend the capabilities of the Python program itself.

Libraries can connect our Python programs to the internet, write AI, draw images, control 3D printers, direct robots, and more. Each of them just gives us a new set of tools to incorporate to our programs.

Finally, Python is a very easy programming language to read, compared to most languages. At first, looking at Python code might seem confusing, but there are very simple rules for Python code relative to other languages. It uses a lot of white spaces to designate what parts of the code belong to each other. This makes reading other peoples code easier, and gives plenty of other, open source code to look at if we get stuck.

As you progress through this book, you may encounter some points where you might not really understand whats happening, or why things must be a certain way.

With so much to learn as a new programmer, it can be very intimidating. Ive tried to anticipate all the places where you may get tripped up, or not understand fully whats happening.

Maintaining the balance between understanding concepts completely and not understanding them at all can drive you crazy as a beginner.

As we go along, Ill call out the most important parts you should fully understand. Most everything else should be fine to skip over at first. Doing things repeatedly is the only way to really absorb all the ideas of programming.