164 lines
13 KiB
Python
164 lines
13 KiB
Python
# Run "python pytudes.py" to create README.md for pytudes
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def nbs(category, *notebooks):
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"""Make a table entry for jupyter/ipython notebooks."""
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header = f'|Run|Year|{category}|\n|---|----|---|\n'
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print(f'{len(notebooks)} notebooks in {category}')
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return header + '\n'.join(nb(*line) for line in notebooks)
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def nb(title, year, url, comment=''):
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"""Make a markdown table entry for a jupyter/ipython notebook."""
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urlb = f'/blob/master/ipynb/{url}'
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co = f'[c](https://colab.research.google.com/github/norvig/pytudes{urlb})'
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dn = f'[d](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'[m](https://mybinder.org/v2/gh/norvig/pytudes/master?filepath=ipynb%2F{url})'
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nb = f'[n](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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if year == 2020: year = f'<u>{year}</u>'
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return f'| {co} {dn} {my} {nb} | {year} | {ti} |'
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def pys(*pyfiles):
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header = '| File | Description | Documentation |\n|:--|:----|----|\n'
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print(f'{len(pyfiles)} pyfiles')
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return header + '\n'.join(py(*line) for line in pyfiles)
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def py(url, description, doc=''):
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"""Make a markdown 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 [c](https://colab.research.google.com) to **run** the notebook on Colab
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- Click on [d](https://deepnote.com) to **run** the notebook on DeepNote
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- Click on [m](https://mybinder.org) to **run** the notebook on MyBinder
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- Click on [n](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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{nbs('Programming Examples',
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('Advent of Code 2020', 2020, 'Advent-2020.ipynb', 'Puzzle site with a coding puzzle each day for Advent 2018 '),
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('Advent of Code 2018', 2018, 'Advent-2018.ipynb', 'Puzzle site with a coding puzzle each day for Advent 2018 '),
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('Advent of Code 2017', 2017, 'Advent%202017.ipynb', 'Puzzle site with a coding puzzle each day for Advent 2017'),
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('Advent of Code 2016', 2016, 'Advent%20of%20Code.ipynb', 'Puzzle site with a coding puzzle each day for Advent 2016*'),
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("Beal's Conjecture Revisited", 2018, 'Beal.ipynb', "A search for counterexamples to Beal's Conjecture"),
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('Bike Speed Versus Grade', 2020, 'Bike%20Speed%20versus%20Grade.ipynb', 'How fast can I bike as the route gets steeper?'),
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("Can't Stop", 2018, 'Cant-Stop.ipynb', 'Optimal play in a dice board game'),
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('Chaos with Triangles', 2019, 'Sierpinski.ipynb', 'A surprising appearance of the Sierpinski triangle in a random walk between vertexes'),
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("Conway's Game of Life", 2017, 'Life.ipynb', 'The cellular automata zero-player game'),
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('Generating and Solving Mazes', 2020, 'Maze.ipynb', 'Make a maze by generating a random tree superimposed on a grid and solve it.'),
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('Photo Focal Lengths', 2020, 'PhotoFocalLengths.ipynb', 'Generate charts of what focal lengths were used on a photo trip.'),
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('Pickleball Tournament', 2018, 'Pickleball.ipynb', 'Scheduling a doubles tournament fairly and efficiently'),
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('Project Euler Utilities', 2017, 'Project%20Euler%20Utils.ipynb', 'My utility functions for the Project Euler problems, including `Primes` and `Factors`'),
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('Tracking Trump: Electoral Votes', 2020, '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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{nbs('Logic and Number Puzzles',
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('Cryptarithmetic', 2014, 'Cryptarithmetic.ipynb', 'Substitute digits for letters and make NUM + BER = PLAY'),
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("Euler's Sum of Powers Conjecture", 2018, "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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('Four 4s, Five 5s, and Countdowns', 2020, '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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('Pairing Socks', 2019, '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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('Sicherman Dice', 2018, 'Sicherman%20Dice.ipynb', 'Find a pair of dice that is like a regular pair of dice, only different'),
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("Sol Golomb's Rectangle Puzzle", 2014, 'Golomb-Puzzle.ipynb', 'A Puzzle involving placing rectangles of different sizes inside a square'),
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("When is Cheryl's Birthday? (new: Mad Cheryl)", 2020, 'Cheryl.ipynb', "Solving the *Cheryl's Birthday* logic puzzle"),
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('When Cheryl Met Eve: A Birthday Story', 2015, 'Cheryl-and-Eve.ipynb', "Inventing new puzzles in the Style of Cheryl's Birthday"),
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('xkcd 1313: Regex Golf', 2015, 'xkcd1313.ipynb', 'Find the smallest regular expression; inspired by Randall Munroe'),
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('xkcd 1313: Regex Golf (Part 2: Infinite Problems)', 2015, 'xkcd1313-part2.ipynb', 'Regex Golf: better, faster, funner. With Stefan Pochmann.'))}
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{nbs('The Riddler (from 538)',
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('Battle Royale', 2017, 'Riddler%20Battle%20Royale.ipynb', 'A puzzle involving allocating your troops and going up against an opponent'),
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('CrossProduct', 2021, 'CrossProduct.ipynb', 'A puzzle where digits fill a table, subject to constraints on their products'),
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('Flipping Cards; A Guessing Game', 2020, 'flipping.ipynb', 'Can you go through a deck of cards, guessing higher or lower correctly for each card?'),
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('Lottery', 2019, 'RiddlerLottery.ipynb', 'Can you find what lottery number tickets these five friends picked?'),
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('How Many Soldiers to Beat the Night King?', 2019, 'NightKing.ipynb', 'A battle between the army of the dead and the army of the living'),
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('Misanthropic Neighbors', 2017, 'Mean%20Misanthrope%20Density.ipynb', 'How crowded will this neighborhood be, if nobody wants to live next door to anyone else?'),
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('Properly Ordered Card Hands', 2018, 'Orderable%20Cards.ipynb', 'Can you get your hand of cards into a nice order with just one move?'),
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('Tour de 538', 2020, 'TourDe538.ipynb', 'Solve a puzzle involving the best pace for a bicycle race.'),
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('Weighing Twelve Balls', 2020, '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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('War. What is it Good For?', 2020, 'war.ipynb', 'How likely is it to win a game of war in 26 turns?'))}
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{nbs('Word Puzzles',
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('Boggle / Inverse Boggle', 2020, 'Boggle.ipynb', 'Find all the words on a Boggle board; then find a board with a lot of words'),
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('Chemical Element Spelling', 2020, 'ElementSpelling.ipynb', 'Spelling words using the chemical element symbols, like CoIn'),
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('Equilength Numbers: FOUR = 4', 2020, 'equilength-numbers.ipynb', 'What number names have the same letter count as the number they name (such as FOUR)?'),
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('Gesture Typing', 2017, 'Gesture%20Typing.ipynb', 'What word has the longest path on a gesture-typing smartphone keyboard?'),
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('Ghost: A Word game', 2017, 'Ghost.ipynb', 'The word game Ghost (add letters, try to avoid making a word)'),
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('How to Do Things with Words: NLP in Python', 2018, 'How%20to%20Do%20Things%20with%20Words.ipynb', 'Spelling Correction, Secret Codes, Word Segmentation, and more'),
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('Jotto: A Word Guessing Game', 2020, 'jotto.ipynb', 'The word guessing game Jotto'),
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("Let's Code About Bike Locks", 2015, '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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('Scrabble: Refactoring a Crossword Game Program', 2017, 'Scrabble.ipynb', 'Refactoring the Scrabble / Word with Friends game from Udacity 212'),
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('Spelling Bee', 2020, 'SpellingBee.ipynb', 'Find the highest-scoring board for the NY Times Spelling Bee puzzle'),
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('Translating English into Propositional Logic', 2017, 'PropositionalLogic.ipynb', 'Automatically convert informal English sentences into formal Propositional Logic'),
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("World's Longest Palindrome", 2017, 'pal3.ipynb', 'Searching for a long Panama-style palindrome, this time letter-by-letter'),
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("World's Shortest Portmantout Word", 2020, 'Portmantout.ipynb', 'Find a word that squishes together a bunch of words'),
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('xkcd 1970: Name Dominoes', 2018, 'xkcd-Name-Dominoes.ipynb', 'Lay out dominoes legally; the dominoes have people names, not numbers'))}
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{nbs('Probability and Uncertainty',
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('A Concrete Introduction to Probability', 2018, 'Probability.ipynb', 'Code and examples of the basic principles of Probability Theory'),
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('Probability, Paradox, and the Reasonable Person Principle', 2016, 'ProbabilityParadox.ipynb', 'Some classic paradoxes in Probability Theory, and how to think about disagreements'),
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('Estimating Probabilities with Simulations', 2020, 'ProbabilitySimulation.ipynb', 'When the sample space is too complex, simulations can estimate probabilities'),
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('The Devil and the Coin Flip Game', 2019, 'Coin%20Flip.ipynb', 'How to beat the Devil at his own game'),
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('Dice Baseball', 2020, 'Dice%20Baseball.ipynb', 'Simulating baseball games'),
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('Economics Simulation', 2018, 'Economics.ipynb', 'A simulation of a simple economic game'),
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('Poker Hand Ranking', 2012, "poker.ipynb", 'How do we decide which poker hand wins? Several variants of poker are considered.'),
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('The Unfinished Game .... of Risk', 2020, "risk.ipynb", "Determining who is likely to win an interminably long game of Risk"),
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('WWW: Who Will Win (NBA Title)?', 2019, 'WWW.ipynb', 'Computing the probability of winning the NBA title, for my home town Warriors, or any other team'))}
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{nbs('Computer Science Algorithms and Concepts',
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('Bad Grade, Good Experience', 2017, 'Snobol.ipynb', 'As a student, did you ever get a bad grade on a programming assignment? (Snobol, Concordance)'),
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('BASIC Interpreter', 2017, 'BASIC.ipynb', 'How to write an interpreter for the BASIC programming language'),
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('Convex Hull Problem', 2017, 'Convex%20Hull.ipynb', 'A classic Computer Science Algorithm'),
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('How to Count Things', 2020, '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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('Stable Matching Problem', 2020, 'StableMatching.ipynb', 'What is the best way to pair up two groups with each other, obeying preferences?'),
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('Symbolic Algebra, Simplification, and Differentiation', 2017, 'Differentiation.ipynb', 'A computer algebra system that manipulates expressions, including symbolic differentiation'),
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('Traveling Salesperson Problem', 2018, 'TSP.ipynb', 'Another of the classics'))}
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# Index of Python Files
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{pys(
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('beal.py', "Search for counterexamples to Beal's Conjecture", 'http://norvig.com/beal.html'),
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('docex.py', 'An obsolete framework for running unit tests, similar to `doctest`'),
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('ibol.py', 'An Exercise in Species Barcoding', 'http://norvig.com/ibol.html'),
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('lettercount.py', 'Convert Google Ngram Counts to Letter Counts', 'http://norvig.com/mayzner.html'),
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('lis.py', 'Lisp Interpreter written in Python', 'http://norvig.com/lispy.html'),
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('lispy.py', 'Even Better Lisp Interpreter written in Python', 'http://norvig.com/lispy2.html'),
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('lispytest.py', 'Tests for Lisp Interpreters'),
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('pal.py', 'Find long palindromes', 'http://norvig.com/palindrome.html'),
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('pal2.py', 'Find longer palindromes', 'http://norvig.com/palindrome.html'),
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('pal3.py', 'Find even longer palindromes', 'http://norvig.com/palindrome.html'),
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('pytudes.py', 'Pre-process text to generate this README.md file.'),
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('py2html.py', 'Pretty-printer to format Python files as html'),
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('SET.py', 'Analyze the card game SET', 'http://norvig.com/SET.html'),
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('spell.py', 'Spelling corrector', 'http://norvig.com/spell-correct.html'),
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('sudoku.py', 'Program to solve sudoku puzzles', 'http://norvig.com/sudoku.html'),
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('testaccum.py', 'Tests for my failed Python `accumulation display` proposal', 'http://norvig.com/pyacc.html'),
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('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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print(f'Wrote {output}; {out.write(body)}, characters')
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