148 lines
11 KiB
Python
148 lines
11 KiB
Python
# Run "python pytudes.py" to create README.md for pytudes
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def nb(title, url, comment=''):
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"""Make a table entry for a ipython notebook."""
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urlb = f'/blob/master/ipynb/{url}'
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co = f'[co](https://colab.research.google.com/github/norvig/pytudes{urlb})'
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dn = f'[dn](https://beta.deepnote.org/launch?template=python_3.6&url=https%3A%2F%2Fgithub.com%2Fnorvig%2Fpytudes%2Fblob%2Fmaster%2Fipynb%2F{url}) '
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my = f'[my](https://mybinder.org/v2/gh/norvig/pytudes/master?filepath=ipynb%2F{url})'
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nb = f'[nb](https://nbviewer.jupyter.org/github/norvig/pytudes{urlb})'
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ti = f'<b><a href="ipynb/{url}" title="{comment}">{title}</a></b>'
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return f'| {co} {dn} {my} {nb} | {ti} |'
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def py(url, description, doc=''):
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"""Make a table entry for a .py file."""
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if doc: doc = f'[documentation]({doc})'
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return f'|[{url}](/blob/master/py/{url})|*{description}*|{doc}|'
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body = f'''
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<div align="right" style="text-align: right"><i>Peter Norvig<br><a href="https://github.com/norvig/pytudes/blob/master/LICENSE">MIT License</a><br>2015-2020</i></div>
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# pytudes
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"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](https://en.wikipedia.org/wiki/%C3%89tude)
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This project contains **pytudes**—Python programs, usually short, for perfecting particular programming skills.
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Some programs are in Jupyter (`.ipynb`) notebooks, some in `.py` files. For each notebook you can:
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- Click on [co](https://colab.research.google.com) to **run** the file on Colab
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- Click on [dn](https://deepnote.com) to **run** the notebook on DeepNote
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- Click on [my](https://mybinder.org) to **run** the notebook on MyBinder
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- Click on [nb](https://nbviewer.jupyter.org/) to **view** the notebook on NBViewer
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- Click on the title to **view** the notebook on github.
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- Hover over the title to **view** a description.
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# Index of Jupyter (IPython) Notebooks
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|Run|Programming Examples|
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|---|--|
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{nb('Advent of Code 2018', 'Advent-2018.ipynb', 'Puzzle site with a coding puzzle each day for Advent 2018 ')}
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{nb('Advent of Code 2017', 'Advent%202017.ipynb', 'Puzzle site with a coding puzzle each day for Advent 2017')}
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{nb('Advent of Code 2016', 'Advent%20of%20Code.ipynb', 'Puzzle site with a coding puzzle each day for Advent 2016*')}
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{nb("Beal's Conjecture Revisited", 'Beal.ipynb', "A search for counterexamples to Beal's Conjecture")}
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{nb('Bike Speed Versus Grade', 'Bike%20Speed%20versus%20Grade.ipynb', 'How fast can I bike as the route gets steeper?')}
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{nb("Can't Stop", 'Cant-Stop.ipynb', 'Optimal play in a dice board game')}
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{nb('Chaos with Triangles', 'Sierpinski.ipynb', 'A surprising appearance of the Sierpinski triangle in a random walk between vertexes')}
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{nb("Conway's Game of Life", 'Life.ipynb', 'The cellular automata zero-player game')}
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{nb('Dice Baseball', 'Dice%20Baseball.ipynb', 'Simulating baseball games')}
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{nb('Generating Mazes', 'Maze.ipynb', 'Make a maze by generating a random tree superimposed on a grid')}
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{nb('Pickleball Tournament', 'Pickleball.ipynb', 'Scheduling a doubles tournament fairly and efficiently')}
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{nb('Project Euler Utilities', 'Project%20Euler%20Utils.ipynb', 'My utility functions for the Project Euler problems, including `Primes` and `Factors`')}
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{nb('Properly Ordered Card Hands', 'Orderable%20Cards.ipynb', 'Can you get your hand of cards into a nice order with just one move?')}
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{nb('Tracking Trump: Electoral Votes', 'Electoral%20Votes.ipynb', 'How many electoral votes would Trump get if he wins the state where he has positive net approval?')}
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{nb('Weighing Twelve Balls', 'TwelveBalls.ipynb', 'A puzzle where you are given some billiard balls and a balance scale, and asked to find the one ball that is heavier or lighter, in a limited number of weighings')}
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{nb('WWW: Who Will Win (NBA Title)?', 'WWW.ipynb', 'Computing the probability of winning the NBA title, for my home town Warriors, or any other team')}
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|Run | Logic and Number Puzzles|
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|--|---|
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{nb('Boggle / Inverse Boggle', 'Boggle.ipynb', 'Find all the words on a Boggle board; then find a board with a lot of words')}
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{nb('Chemical Element Spelling', 'ElementSpelling.ipynb', 'Spelling words using the chemical element symbols, like CoIn')}
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{nb('Cryptarithmetic', 'Cryptarithmetic.ipynb', 'Substitute digits for letters and make NUM + BER = PLAY')}
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{nb('Four 4s, Five 5s, and Countdown to 2016', 'Countdown.ipynb', 'Solving the equation 10 _ 9 _ 8 _ 7 _ 6 _ 5 _ 4 _ 3 _ 2 _ 1 = 2016. From an Alex Bellos puzzle')}
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{nb('Gesture Typing', 'Gesture%20Typing.ipynb', 'What word has the longest path on a gesture-typing smartphone keyboard?')}
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{nb('Ghost', 'Ghost.ipynb', 'The word game Ghost (add letters, try to avoid making a word)')}
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{nb('How Many Soldiers Do You Need to Beat the Night King?', 'NightKing.ipynb', 'Investigasting a battle between the army of the dead and the army of the living')}
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{nb("Let's Code About Bike Locks", 'Fred%20Buns.ipynb', 'A tale of a bicycle combination lock that uses letters instead of digits. Inspired by Bike Snob NYC')}
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{nb('Pairing Socks', 'Socks.ipynb', 'What is the probability that you will be able to pair up socks as you randomly pull them out of the dryer?')}
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{nb('Portmantout Words', 'Portmantout.ipynb', 'Find a long word that squishes together a bunch of words')}
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{nb('Refactoring a Crossword Game Program', 'Scrabble.ipynb', 'Refactoring the Scrabble / Word with Friends game from Udacity 212')}
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{nb('Riddler Lottery', 'RiddlerLottery.ipynb', 'Can you find what lottery number tickets these five friends picked?')}
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{nb('Sicherman Dice', 'Sicherman%20Dice.ipynb', 'Find a pair of dice that is like a regular pair of dice, only different')}
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{nb("Sol Golomb's Rectangle Puzzle", 'Golomb-Puzzle.ipynb', 'A Puzzle involving placing rectangles of different sizes inside a square')}
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{nb('Spelling Bee', 'SpellingBee.ipynb', 'Find the highest-scoring board for the NY Times Spelling Bee puzzle')}
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{nb('The Devil and the Coin Flip Game', 'Coin%20Flip.ipynb', 'How to beat the Devil at his own game')}
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{nb('The Puzzle of the Misanthropic Neighbors', 'Mean%20Misanthrope%20Density.ipynb', 'How crowded will this neighborhood be, if nobody wants to live next door to anyone else?')}
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{nb('The Riddler: Battle Royale', 'Riddler%20Battle%20Royale.ipynb', 'A puzzle involving allocating your troops and going up against an opponent')}
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{nb('Translating English Sentences into Propositional Logic Statements', 'PropositionalLogic.ipynb', 'Automatically convert informal English sentences into formal Propositional Logic')}
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{nb('How to Do Things with Words: NLP in Python', 'How%20to%20Do%20Things%20with%20Words.ipynb', 'Spelling Correction, Secret Codes, Word Segmentation, and more')}
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{nb('When Cheryl Met Eve: A Birthday Story', 'Cheryl-and-Eve.ipynb', "Inventing new puzzles in the Style of Cheryl's Birthday")}
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{nb("When is Cheryl's Birthday?", 'Cheryl.ipynb', "Solving the *Cheryl's Birthday* logic puzzle")}
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{nb("World's Longest Palindrome", 'pal3.ipynb', 'Searching for a long Panama-style palindrome, this time letter-by-letter')}
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{nb('xkcd 1313: Regex Golf (Part 2: Infinite Problems)', 'xkcd1313-part2.ipynb', 'Regex Golf: better, faster, funner. With Stefan Pochmann')}
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{nb('xkcd 1313: Regex Golf', 'xkcd1313.ipynb', 'Find the smallest regular expression; inspired by Randall Monroe')}
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{nb('xkcd 1970: Name Dominoes', 'xkcd-Name-Dominoes.ipynb', 'Lay out dominoes legally; the dominoes have people names, not numbers')}
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|Run|Math Concepts|
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|--|--|
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{nb('A Concrete Introduction to Probability', 'Probability.ipynb', 'Code and examples of the basic principles of Probability Theory')}
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{nb('Probability, Paradox, and the Reasonable Person Principle', 'ProbabilityParadox.ipynb', 'Some classic paradoxes in Probability Theory, and how to think about disagreements')}
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{nb('Estimating Probabilities with Simulations', 'ProbabilitySimulation.ipynb', 'When the sample space is too complex, simulations can estimate probabilities')}
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{nb('Economics Simulation', 'Economics.ipynb', 'A simulation of a simple economic game')}
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{nb("Euler's Sum of Powers Conjecture", "Euler's%20Conjecture.ipynb", 'Solving a 200-year-old puzzle by finding integers that satisfy a<sup>5</sup> + b<sup>5</sup> + c<sup>5</sup> + d<sup>5</sup> = e<sup>5</sup>')}
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{nb('How to Count Things', 'How%20To%20Count%20Things.ipynb', 'Combinatorial math: how to count how many things there are, when there are a lot of them')}
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{nb('Symbolic Algebra, Simplification, and Differentiation', 'Differentiation.ipynb', 'A computer algebra system that manipulates expressions, including symbolic differentiation')}
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|Run|Computer Science Algorithms and Concepts|
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|--|--|
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{nb('Bad Grade, Good Experience', 'Snobol.ipynb', 'As a student, did you ever get a bad grade on a programming assignment? (Snobol, Concordance)')}
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{nb('BASIC Interpreter', 'BASIC.ipynb', 'How to write an interpreter for the BASIC programming language')}
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{nb('The Convex Hull Problem', 'Convex%20Hull.ipynb', 'A classic Computer Science Algorithm')}
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{nb('The Stable Matching Problem', 'StableMatching.ipynb', 'What is the best way to pair up two grpups with each other, obeying preferences?')}
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{nb('The Traveling Salesperson Problem', 'TSP.ipynb', 'Another of the classics')}
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# Index of Python Files
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| File | Description | Documentation |
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|:--------|:-------------------|----|
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{py('beal.py', "Search for counterexamples to Beal's Conjecture", 'http://norvig.com/beal.html')}
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{py('docex.py', 'A framework for running unit tests, similar to `doctest`')}
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{py('ibol.py', 'An Exercise in Species Barcoding', 'http://norvig.com/ibol.html')}
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{py('lettercount.py', 'Convert Google Ngram Counts to Letter Counts', 'http://norvig.com/mayzner.html')}
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{py('lis.py', 'Lisp Interpreter written in Python', 'http://norvig.com/lispy.html')}
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{py('lispy.py', 'Even Better Lisp Interpreter written in Python', 'http://norvig.com/lispy2.html')}
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{py('lispytest.py', 'Tests for Lisp Interpreters')}
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{py('pal.py', 'Find long palindromes', 'http://norvig.com/palindrome.html')}
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{py('pal2.py', 'Find longer palindromes', 'http://norvig.com/palindrome.html')}
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{py('pal3.py', 'Find even longer palindromes', 'http://norvig.com/palindrome.html')}
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{py('pytudes.py', 'Pre-process text to generate this README.md file.')}
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{py('py2html.py', 'Pretty-printer to format Python files as html')}
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{py('SET.py', 'Analyze the card game SET', 'http://norvig.com/SET.html')}
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{py('spell.py', 'Spelling corrector', 'http://norvig.com/spell-correct.html')}
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{py('sudoku.py', 'Program to solve sudoku puzzles', 'http://norvig.com/sudoku.html')}
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{py('testaccum.py', 'Tests for my failed Python `accumulation display` proposal', 'http://norvig.com/pyacc.html')}
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{py('yaptu.py', 'Yet Another Python Templating Utility')}
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# Etudes for Programmers
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I got the idea for the *"etudes"* part of the name from
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this [1978 book](https://books.google.com/books/about/Etudes_for_programmers.html?id=u89WAAAAMAAJ)
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by [Charles Wetherell](http://demin.ws/blog/english/2012/08/25/interview-with-charles-wetherell)
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that was very influential to me when I was first learning to program. I still have my copy.
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'''
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output = 'README.md'
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with open(output, 'w') as out:
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out.write(body)
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print(f'Wrote {output}; {len(body)} characters')
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