pytudes

“An étude (a French word meaning study) is an instrumental musical composition, usually short, of considerable difficulty, and designed to provide practice material for perfecting a particular musical skill.” — Wikipedia

This project contains pytudes—Python programs for perfecting programming skills.

Some are in Jupyter (IPython) notebooks, some in .py files. You can view the files here, or clone the project, or run the notebooks online by clicking this button:

Index of Jupyter (IPython) Notebooks

Logic and Number Puzzles
Advent of Code 2017 Puzzle site with a coding puzzle each day for Advent 2017.
Advent of Code 2016 Puzzle site with a coding puzzle each day for Advent 2016.
Translating English Sentences into Propositional Logic Statements Automatically converting informal English sentences into formal Propositional Logic.
The Puzzle of the Misanthropic Neighbors How crowded will this neighborhood be, if nobody wants to live next door to anyone else?
Countdown to 2016 Solving the equation 10 _ 9 _ 8 _ 7 _ 6 _ 5 _ 4 _ 3 _ 2 _ 1 = 2016. From an Alex Bellos puzzle.
Sicherman Dice Find a pair of dice that is like a regular pair of dice, only different.
Beal’s Conjecture Revisited A search for counterexamples to Beal’s Conjecture
When is Cheryl’s Birthday? Solving the “Cheryl’s Birthday” logic puzzle.
When Cheryl Met Eve: A Birthday Story Inventing new puzzles in the Style of Cheryl’s Birthday.
Sol Golomb’s Rectangle Puzzle A Puzzle involving placing rectangles of different sizes inside a square. Bonus: cryptarithmetic.
WWW: Will Warriors Win? Golden State Warriors probability of winning the 2016 NBA title.

Word Games
Ghost The word game Ghost (add letters, try to avoid making a word).
World’s Longest Palindrome Searching for a long Panama-style palindrome, this time letter-by-letter.
Refactoring a Crossword Game Program Refactoring the Scrabble / Word with Friends game from Udacity 212.
xkcd 1313: Regex Golf Find the smallest regular expression; inspired by Randall Monroe.
xkcd 1313: Regex Golf (Part 2: Infinite Problems) Regex Golf: better, faster, funner. With Stefan Pochmann.
Let’s Code About Bike Locks A tale of a bicycle combination lock that uses letters instead of digits. Inspired by Bike Snob NYC.
Gesture Typing What word has the longest path on a gesture-typing smartphone keyboard? Inspired by Nicolas Schank and Shumin Zhai.
How to Do Things with Words, or Statistical Natural Language Processing in Python Spelling Correction, Secret Codes, Word Segmentation, and more: grab your bag of words.

Computer Science Algorithms, Concepts, and Problems
A Chaos Game with Triangles A surprising appearance of the Sierpinski triangle in a random walk between vertexes.
BASIC Interpreter How to write an interpreter for the BASIC programming language.
Bad Grade, Good Experience As a student, did you ever get a bad grade on a programming assignment? (Snobol, Concordance)
Conway’s Game of Life The cellular automata zero-player game.
A Concrete Introduction to Probability Code and examples of the basic principles of Probability Theory.
Probability, Paradox, and the Reasonable Person Principle Some classic paradoxes in Probability Theory, and how to think about disagreements.
The Convex Hull Problem A classic Computer Science Algorithm.
The Traveling Salesperson Problem Another of the classics.
Economics Simulation A simulation of a simple economic game.
Project Euler Utilities My utility functions for the Project Euler problems, including Primes and Factors.

Index of Python Files

File	Description	Documentation
SET.py	Analyze the card game SET.	SET.html
beal.py	Search for counterexamples to Beal’s Conjecture	beal.html
docex.py	A framework for running unit tests, similar to doctest.
ibol.py	An Exercise in Species Barcoding	ibol.html
lettercount.py	Convert Google Ngram Counts to Letter Counts	mayzner.html
lis.py	Lisp Interpreter written in Python	lispy.html
lispy.py	Even Better Lisp Interpreter written in Python	lispy2.html
lispytest.py	Tests for Lisp Interpreters
pal.py	Find long palindromes	palindrome.html
pal2.py	Find longer palindromes	palindrome.html
pal3.py	Find even longer palindromes	palindrome.html
py2html.py	Pretty-printer to format Python files as html
spell.py	Spelling corrector	spell-correct.html
sudoku.py	Program to solve sudoku puzzles	sudoku.html
testaccum.py	Tests for my failed Python accumulation display proposal	pyacc.html
yaptu.py	Yet Another Python Templating Utility

Etudes for Programmers

I got the idea for the “etudes” part of the name from this 1978 book by Charles Wetherell that was very influential to me when I was first learning to program.