PyCon 2015

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PyCon 2015Good/Interesting Quotes/Tweets[regarding the pycon5k] - "It's a great ..."I'm not a technologist, but I don't und ...sites to check outc4a.me/pyconCode for Americahttp://www.codeforamerica.org/brigade/in ...https://storify.com/cczona/schemas-for-t ...Tools to investigateanaconda - package mgmtcanopyread_excel in pandasopen webapp manifest?apk factory?jnettoolsversioneerseaborn librarypairplottoku mxhtml2csvbanditsecurity analysis for pythonblaze - panda like interface or querying ...progrium githubregistratorvulcandfleetvirtual overlay networkstatic addressesweave - software defined networksystemdsocket activation with doctortodo/ideaswatch the tom cruise church of scientolo ...use docker for more isolation/portabilit ...python3! Just do it!Friday KeynotesIntroKeynote: Catherine Bracy - Code for Amer ...Machine Learning 101PyPy.js: What? How? Why?Beyond PEP 8 - Best Practices for Beauti ...How to make your code Python 2/3 compati ...Advanced GitConcurrency from the Ground UpLosing your Loops: Fast Numerical Comput ...The REST AscendancyFriday Lightening TalksJyNI behind the scenesWaterbutlerBrazwell Shared Notification system13 facts about unicodeRDBMS were so last yearpgclipybraindiff-coverdiff qualityPyCamp Teen PeruModular-ODMwhy not compile your cloudSaturday Morning Lightening TalksMatplotlib Enhancement 22flakyReeborg: Karel on steroidsScraping Property Tax SitesDucker: Quack at your DocsSaturday KeynotesGuido van Rossum: General topicsYou can't arrest an idea: inside Anonymo ...Systems Programming as a swiss army knif ...Demystifying DockerOther People's Messy Data (and how not t ...To ORM or not to ORMdocker in production open spacespark open spaceSaltStackLightening Talks: Saturday AfternoonThat one weird thing about Englishreplacing pstats with ipython notebookusing python to determine difference bet ...Quick Design WinsCode Comments- what are they good forHow do dolphins and whales hearC3 under controlSymbollic LiteralsPlaying with Python BytecodeLightening Talks: Sunday Morningkeyboard ergonomicsgenomicsaward winning adventure game in python3manage your science lab with Pythonagilefunctional programming ideas in pythonSunday Morning KeynotesVan LindbergJacob Kaplan MossPoster sessionsInteractive Data for the WebTerminal WhisperingSunday Afternoon KeynoteGuido van Rossum: Gradual Typing for Pyt ...IDEOLOGY / Imposter SyndromePyCon 2016portlandTutorial: May28-29Conference: may 30-june1Sprints June 2-
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PyCon 2015
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Good/Interesting Quotes/Tweets
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[regarding the pycon5k] - "It's a great place to meet people who like waking up at 7am and running 5k, which much be a great group of people I'd imagine'
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"I'm not a technologist, but I don't understand why a database would be.... closed..." -Catherine Bracy
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sites to check out
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c4a.me/pycon
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Code for America
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http://www.codeforamerica.org/brigade/index/Open-Data-Cincy
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https://storify.com/cczona/schemas-for-the-real-world
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Tools to investigate
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anaconda - package mgmt
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canopy
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read_excel in pandas
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open webapp manifest?
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apk factory?
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jnettools
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versioneer
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seaborn library
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pairplot
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toku mx
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html2csv
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bandit
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security analysis for python
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blaze - panda like interface or querying large datasets
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progrium github
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registrator
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vulcand
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fleet
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virtual overlay network
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static addresses
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weave - software defined network
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systemd
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socket activation with doctor
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todo/ideas
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watch the tom cruise church of scientology youtube/gawker
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use docker for more isolation/portability of apps
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python3! Just do it!
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Friday Keynotes
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Intro
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What's happened
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$300,000 in financial aid
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36 tutorials
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language summit
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Opening Recepton
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Django Girls workshop
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Going to happen
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Learn awesome stuff
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machine learning
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pure math
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games
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advertising
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satellites
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3d printing
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rust
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deafness
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hallway track
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Sprints
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Keynote: Catherine Bracy - Code for America
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cbracy
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Code for America
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Also worked on Obama's re-election campaign
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healthcare.gov
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obamacare almost failed because of a website
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not an anomoly
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94% website over 10 million dollars are either overbudget, delivered late, or just dont work
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Other government failures
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Florida site said to delay millions in aid to jobless
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unemployment lines
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$63 million
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LA Unified School District
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Student planning system
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grades, class schedules, everything
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$130 million
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7 years late
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2 weeks of school kids sitting in auditoreums, with no class schedule
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Health Arizona Plus
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data unavailable during the following times
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Low turnout for elections related to sense that government just doesn't work?
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"Good governance and good policy are now inextricably linked to the digital" - Tom Steinberg - founder of mySociety
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Code for America
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Stop Waiting for permission - google on "How civic hacking changed the way I saw my citty -- and myself"
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Lauren
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Fellowship - full time programmig
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stream line their court system
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Tiffani Ashley Bell
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"Detroit Water Project"
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matches donors to fund water bills
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The Brigade - Citizen volunteers
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meet weekly
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partner with governments
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citizens who care / with government
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"Adopt a Drain" - adopt a hydrant spinoff
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"open oakland"
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Balance project - food stamp balance via text (rather than $.75/atm transaction)
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Join the brigade
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Apply for the Fellowship
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Learn about tech jobs in government
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Launch a code-for program i your country
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code for america! right now!
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click that hood
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c4a.me/pycon
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Code For America
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Doesn't work on the politics
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Only works on the Buerocracy
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- doesn't work with the federal government
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Machine Learning 101
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Kyle Kastner
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LISA / MILA
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https://github.com/kastnerkyle/PyCon2015
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what is machine learning
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Automation
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data analysis
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applications
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speech processing
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image processing
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nlp
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advertising
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click through rates
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recommendations
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automation spectrum
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handcrafted rules
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expert rules
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magic constants
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statistics
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linear models
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p values
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bayesian stats
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MCMC samping
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machine learning
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k-means
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svm
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random forests
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Deep learnig
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neural networks
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autoencoders
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manifold hypothesis
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most things look like the things around it (rather than randomness)
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classification problem
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regression
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Learning functions
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recommend_movies(seen_movies, ratings): return best_unseen_movies
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train / valid / test
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split current data
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evaluate
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typical split
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80%
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20%
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anaconda
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canopy - package manageent system?
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Deep neural networks
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build a neural network similar to scikitlearn
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pretty much need to follow the ipython
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PyPy.js: What? How? Why?
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Ryan Kelly
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ryan@rfk.id.au
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mozilla
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mozilla "hearts" the web
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the web == tech
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http
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html
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css
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javascript
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the web == culture
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open
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upiquitious
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secure
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trustworthy
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the web
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cons
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http
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html
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css
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javascript
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pros
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for mozilla, if it can't be done on the web, it's a bug
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I want to code in python
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that's a bug
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pypy.js
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not the first
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pyjamas
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pyjs
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rusthon
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pythonium
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skulpt
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brython
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pythonium
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and a lot more
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What does it mean
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compatibility
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must actually be python
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10 ** 100
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sys._getframe()
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performance
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from test import pystone
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pystone.main()
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webishness
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import js and interact
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js.eval(" ")
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js.globals.alert("foo")
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js.globals['$']
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q("#console")
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how
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PyPy
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python interpretter in python (rpython - restricted)
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toolchain for translating rpython to C
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a JIT-Compiler Generator
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pypy.py
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rpython into pypy.c
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gcc into pypy.x86
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plus mycode.py
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mycode.x86
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emscripten
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backend for llvm
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generates Javascript
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simulated posix environment in javascript
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originally for porting games to the web
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in javascript
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an extraoridinarly optimizable, low level subset of javascript
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asm.js
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mycode.c
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emcc -> mycode.js
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js jit -> mycode.x86
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pypy.js = pypy + emscripten
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"It's awful all the way down"
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arewepythonyet.com
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Why?
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alternative
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brython.info
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rusthon
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???
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Ipython
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NumPyPy + fortran libs
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free stuff
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bitbucket.org/pypy/pypy
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pyrolog
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prolog interpretter
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File bugs against the web
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@rfkelly
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Beyond PEP 8 - Best Practices for Beautiful intelligible Code
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Raymond Hettinger
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worst thing about line length: Someone will pep-8 me.
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working around line length doesn't involve making the code better
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just shorten variable names : makes code worse
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90-ish
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people with problems in the codebase tend to gravitate to pep8
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kind of a makework job
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pep-8 fixers obfuscate the history
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pep-8
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ends up with code that is beautiful but bad
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distracts you from what is important
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pep-8 unto yourself, not others
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use modules rather than packages if you can
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use context manager rather than try/except
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use types rather than building methods
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e.g. replace getter/setter into properties
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Beyond pep-8 - pay attention to what python is good at
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P vs NP problem
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pythonic vs non-pythonic
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"If your users are having to type a lot of dots in their code, you're doing it wrong"
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Adapter pattern
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transforms one API into another one
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custom exceptions
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repr's for readability
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properties rather than accessors
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use sane function/identifier names
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in python, you don't have to use keyword arguments, but you can (to make the function call more clear)
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namedtuples vs tuples without identifiers
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focus on clarity
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How to make your code Python 2/3 compatible
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Brett Cannon
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brett@python.org
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not about convincing
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pycon 2013 talk
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you can start today!
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dont wait for dependencies
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python3porting.com
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whats new document
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porting howto
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docs.python.org/3/howto/pyporting.html
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Learn to love 'six'
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compat library to smooth edges
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single module for easy vendoring
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pypi.python.org/pypi/six
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Only support 2.7
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2.6 isn't even supported for bugs anymore
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good test coverage is critical
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so you don't break things when porting
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coverage.py is handy
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new file template
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# coding: utf-8

from __future__ import (absolute_import,
division, print_function, unicode_literals)
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transpilers do all the easy stuff
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modernize
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harnesses 2to3 to updating python code to work with python 2.6/3 as much as possible
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futurize
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modernize but with more of a python 3 feel
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provides backports of things from python3 such as bytes type
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part of the future project
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some fixes require thinking
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need to care about text vs binary data
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can't conflate the two anymore
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need to care bout text vs binary data apis
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unicode/str in python 2
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str/bytes in python3
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b prefix + unicode_literals future statement
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you should know what every string literal is (string vs bytes)
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if you're working with text
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make it work with unicode
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if working with binary data
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indexing with bytes returns an int
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str
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__mod__
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encode
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format
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isdecimal
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isnumeric
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bytes
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decode
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python 3.5 improvements
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bytes interpolation
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b'I %s bytes' % (b'love', )
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-b helps when comparing bytes to ints
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Division
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5/2 = 2 in python2
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2.5 in python3
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pylint
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--py3k flag to run only checks related to python3 compatibility
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python flags
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-3
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triggers warnings under python2
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-b
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under python3 to issue warnings about byte issues
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Dependencies
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caniusepython3.com
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pypi.python.org/pypi/caniusepython3
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API for test integration
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checks indirect dependencies
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getting dependencies ported
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ask
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do it yourself
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hire someone
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extensions
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cffi
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cython
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ctype for extensions
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Latest!
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continuous integration
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tox to run tests under various python versions
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pylint --py3k
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Advanced Git
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David Baumgold
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@singingwolfboy
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bit.ly/git-pycon-2015
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basics
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clone, checkout, commit, push/pull
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status
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current state of repo
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git show
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show's the commit you're currently sitting on
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show's commit messages and diffs
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git blame
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git cherry-pick
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creates an entirely new commit off of a commit
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git reset
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reset the branch pointer
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git reset --hard HEAD^
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git reset with no args: pops off the commit, but doesn't change the disk contents, but allows you to recommit
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git reset --hard throws away the changes too
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symbolic branch locatons
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HEAD = commit I'm on
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HEAD^ = this commit's parent
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HEAD^^ = this commit's grandparent
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HEAD~5
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git rebase
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changes history
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warnings
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never change history when other people might be using your branch
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never change history on master
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moves a feature branch to another root on master using cherry pick
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while on a feature branch
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git rebase master
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git will reject the push if the branches diverged
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git push -f
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with a conflict
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resolve the conflict
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git rebase --continue
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or if you want to start over:
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git rebase --abort
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git reflog
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git log: shows history in ancestor order
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git reflog: shows history in time order
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git commit --amend
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update the last commit with additional changes
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interactive rebase
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user interface
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move pick to squash
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git rebase --interactive
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"did a bunch of things""
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move pick to edit
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git bisect
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the feature is broken? Was just fine!
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bisect helps you find where things broken
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needs
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test
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a commit where things were working
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a commit where things were not working
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git bisect start
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git checkout broken-commit
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git bisect broken
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gt checkout
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git bisect run my_test.sh
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Concurrency from the Ground Up
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David Beazley
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@dabeaz
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all live demo... very cool though
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network
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Losing your Loops: Fast Numerical Computing with NumPy
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Using numpy effectivly to do data intensive computing
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Python is fast: for writing, testing and developing fast
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high leel, interpreted, dynamic typed language
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Python is slow
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repeated tasks
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python is around 1000x than fortran for tight loops of lots of repetitions
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what makes python fast for development makes it slow for execution
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solution, remove python loops
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4 strategies for speeding up code with numpy
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ufuncs
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universal function
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operates elementwise on arrays
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a= [ 1, 3, 2, 5, ]
b = [x + 5 for x in a]

import numpy as np
a = np.array(a)

b = a + 5 # element-wise
print b
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arithmetic operators
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bitwise
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comparision operators
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trig family
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special functions
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aggregations
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aggregations are functions which summarize an array
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e.g. min, max, sum, mean, etc
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numpy is much faster than python builtins
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can work on multidimensional arrays
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M.sum(axis=)
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min, max, sum, prod, mean, std, variance, any, all, median, percentile, argmin, argmax, nanmin, nanmax, nansum (ignores not-a-number)
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broadcasting
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set of rules which ufuncs apply to a numpy object
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rules
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if array shapes differ, left-pad the smaller shape with 1s
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dimension does not match broadcast the dimension with size=1
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adding a scalar to a vector
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np.arange(3) - 5
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slicing, masking, fancy indexing
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lists are indexed by integers for single value
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indexed by slices for multiple values
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np.array have similar indexes, plus
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more indexing (fast)
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masking
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A = array([2,3,5,7,11])
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mask = np.array([False, True, True, False, True])
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A[mask]
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fancy indexing
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A
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index = [0, 4, 2]
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A[index]
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computing nearest neighbor
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D2 = (xi - xj)2 + (yi - yj)2
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x = np.random((1000 3))

X.shape

(1000,3)

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@jakevdp
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vanderplas.com
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jakevdp.github.io/
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The REST Ascendancy
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Javascript taking a bigger role
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Why REST
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angular.js
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ember
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backbone.js
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react.js
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frontend frameworks
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past
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frontend
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display logic, interactions
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backend
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app logic
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database
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cache
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exchange of HTML
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current/future
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frontend
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display logic
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interactions
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app logic
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backend
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app logic
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database
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cache
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exchange of json
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Best of the REST
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django rest framework
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flask restful
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pyramid cornice
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rest api
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need to think about serialization
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pull out of database and passed to JS rest framework
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need views
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django view
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defines query
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define serializer
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Permissions
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a BasePermission subclass
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has a has_object_permission(self, reqest, view, obj) method
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Pain points
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who's the consumer of your api
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used to be developer facing api's
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now: your own app
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trust model
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can't trust that you're the one using the API
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authentication
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session based auth
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rest_framework.authentication.SessionAuthentication()
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token auth
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JSON web token
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kind of like a TGT
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signed auth
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all the things!
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permissions
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table level permissions
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column level permissions
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row level permissions
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read / write permissions
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multiple simultaneous auth methods
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rest conditions
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library for building buildable permission sets
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Or/And objects
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the future
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embetterment
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better tokens and signed URLs
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combine list and object permissions
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permission organization
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Friday Lightening Talks
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JyNI behind the scenes
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java and python have individual strengths and isses
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Java native interfaces
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Stegan Richthofer
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Waterbutler
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serving streams asynchronously
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non-profit science shop
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Open Science framework
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lots of services are syncronous
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e.g. dropbox
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Brazwell Shared Notification system
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OSF
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dev shop
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share notify
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gather metadata from variety of providers
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30 data providers
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normalize it
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spit out json notification
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13 facts about unicode
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Ant6n Dubrau
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write the world's scripts
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unicode can represent characters of previous encodings
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wingdings
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unicode mapping codepoints -> bytes
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bytes -> code points -> characters
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utf-8, utf-16
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7 Unicode sequence represent graphemmes
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a unit of wrting of a particular writing system
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8 Graphemes represented visually by glyphs
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9 combination
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lating smal ligature ff
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squared ppm
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10
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11 similar characters: semicolns and greek question mark
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canonicallization
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RDBMS were so last year
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Catherine Devlin
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sqlalchemy
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rdbms toolbox
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meta toolbox
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ddlgenerator
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import data and define tables
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ipython_sql
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insert into a pandas dataframe
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test database
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rdbms-subsetter
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get a consistent test database
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tinyurl.com/pycon2015-sqla-tools
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pgcli
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postgresql repl
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github:amjith/pgcli
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pgcli.com
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mysql cli
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pybrain
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hobson lane
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@hobsonlane
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pug
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pandas dataframe
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daily weather
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diff-cover
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bring coverage from 0 to 100, 1 pull request at a time
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goo.gl/C3o6WG
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diff quality
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supports
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pep-8
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pyflakes
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github.com/bachman1234/diff-cover
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pip install diff-cover
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PyCamp Teen Peru
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Women and Kids to enter Programming
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@andreagrr
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Modular-ODM
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database agnostic object-document mapper
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python object to documents in a database
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better than status quo
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multiple backends
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mongodb
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pickle
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ephemeral (in-memory)
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concurrency
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document stores at same time)
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partial copies
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schema migrations
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caching
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python3 works
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why not compile your cloud
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Edgar ROman
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emroman@pbs.org
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software dev
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IDe
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code
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vcs
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interpretter compiler
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settings
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runtime env
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Continuous integration
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runtimes have
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settings
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interpetter / compiler
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openstack
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chef
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vcs
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code
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heat
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open tosca
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cloudify
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"if you ssh into your virtual servers, it's like editing you copiled binaries
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open.pbs.org
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Saturday Morning Lightening Talks
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Matplotlib Enhancement 22
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Toolmanager for matplotlib
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adds ability to add
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flaky
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pip install flaky
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github.com/flaky
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flaky tests
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fail 1 percent or less
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failure mode that is hard to fix
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often pass when rerun
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mathematics of flaky tests
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a few flaky tests really can impact test runs
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decorate a test with the @flaky decorator
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py.test and nose plugin
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opensource.box.com/flaky/Flaky.ipynb
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Reeborg: Karel on steroids
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Andre' Roberge
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karel the robot invented in 1981
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Richard pattis invented Karel in 1981
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Guido van Robot
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wrote by Jeff Elkner
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reeborg.ca
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nothing to download
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Scraping Property Tax Sites
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a little python goes a long ways
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property tax analysis for defaults
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html2csv
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chrisfs@gmail.com
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chris stehlik
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Ducker: Quack at your Docs
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Phili [something]
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loves documentation
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rubber duck debugging
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a chatbot
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ducker, I'm confused
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man pages + eliza
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github.com/phildini/ducker
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@phildini
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Saturday Keynotes
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Guido van Rossum: General topics
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guido@python.org
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python3
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does the job better
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"have to do the real work"
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5000+ packages on PyPy ported to 3
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55000+ not yet ported
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the community needs a model for project lifespan, including maintainer burnout
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PEP484
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Type hints
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standard notation for function annotations
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helps IDEs
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diversity
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Python in Iraq: 50% women
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no women in language summit
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want at least two female core devs
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Q/A
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You can't arrest an idea: inside Anonymous
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Gabriella Coleman
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anthropolgist
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computer hacker and geeks
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studies the effect of free software on people
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Hacker, Hoaxer, Whistleblower, Spy: The many faces of anonymous
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many faces
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protest movement
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symbol for popular revolt
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popularized digital direction action
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meeting groupnd etween art & politics
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laboratory to experiment in the art of self effacement
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idea/iconography
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free for forking
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somewhat similar to Luther Blissett
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earlier examples as well
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4 ex Membrs of anonymous/lulzsec
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interviewed
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her definition:
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Activist ensemble that is multitudinous, prolific and longitudinal
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trolling morphed to activism
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scientology
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wikileaks
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anonops
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wikileaks / cable memos
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operation payback
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Tunisia / arab spring
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Operation HB Gary
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Aaron Barr
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70,000 emails download from hbg
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lulzsec into antisec
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2012-2014 trolling under anonymous mostly stops
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riseup.net?
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Stop SOPA
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BiellaColeman
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Systems Programming as a swiss army knife
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Using operating system to make you a better programmer
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what Linux does when you go to a web address
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typing in letters of an address
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handling every network packet
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writing history files to disk
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allocating memory
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communicating with the graphics cards
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How to call Operating System Call
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system calls
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open files
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start a file
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change permissions
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using systems knowledge to debug
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mystery 1: the case of the mystery config file
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strace
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traces system calls
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network spying with recvfrom
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cli args
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Case 2: Case of the french website
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using ngrep for debugging http
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network spying tools
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ngrep
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tcpdump
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wireshark
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mitmproxy
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chapter 3: case of the slow program
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profiling with system tools
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3 slow problems
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cpu time
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too many writes
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waiting for a slow server
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"time ls"
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sudo cat /proc/PID/stack
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could determine it was stuck in network wait
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dstat
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julia evans
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@b0rk
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Demystifying Docker
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Andrew Baker
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Introduction to Docker
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oreilly video
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Intro
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"It worked in my development environment"
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docker solves this problem
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"build once, run anywhere
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a software container
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OS level deps
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python level deps
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app level configs
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what is docker
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not
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virtualization tool
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config maagermnet
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not virt management like vagrant
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on spectrum from manual config to VMs
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docker starts up very fast
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container virtualization
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docker in practice
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3 env
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dev server
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build server
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production
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web stack
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django web
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nginx
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redis
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postgres
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push new code to git server, build server pulls
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Dev machine has each process
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one process per container
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build server builds a docker image
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push docker image to a docker registry
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image is a snapshot of the entire environment
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containers vs images
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containers - how you run your application
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images - how you store your application
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Dockerfiles
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FROM ubuntu

RUN apt-get update

RUN apt-get install -y mongodb-10gen

EXPOSE 27017

CMD ("....")

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Docker library
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python
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nginx
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past present future
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announced at PyCon
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dotCloud
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tons of open source projects
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dependency heavy utilities
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2014: get to 1.0 production ready
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establish partnerships
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2015
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make docker easier to use
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popularize best practices for scaling
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"more batteries"
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docker-compose
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trying it yourself
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Go all in on a non-essential service
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use the official base images
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don't be afraid to build your own
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install docker-compose (formerly fig) right after installing docker
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docker tutorial
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docker.atbaker.me
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Other People's Messy Data (and how not to hate it)
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Hell is Other People's Data
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@makmanalp
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Atlas of Economic complexity -
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https://github.com/TheUpshot/Military-Surplus-Gear
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Pandas - Excel on crack
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Reading Data in
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pd.read_
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unicode sandwich compliant
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ned batchfeld talk
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chardet
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char set detection library
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unidecode - un-unicode
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df = pd.read_excel()
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Explore
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df.columns
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df.describe
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summary description
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df.info()
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type info of columns
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types are important
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df.UI.value_counts()
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merging on different types makes data disappear
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cleaning
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converting types:
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dtype={column_name: type}
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df.column = ..
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kinds of nothing
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no data available: None
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nullify
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identifiers (not numbers)!
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social security number
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zip codes, etc
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categoricals variables: not strings!
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ordinals
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dealing with missing data
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dropnulls()
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by default will drop if any has nulls
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df.fillna(method="bfill")
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playing with data
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selecting columns
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df.State
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df["Item Name"]
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df[["state", "Country"]]
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selecting
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expensive_stuff = df["Acquisition cost"] > 10000
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df[expensive_stuff]
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df.sort
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df.UI.value_counts()
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df.column.str.contains("(regex)")
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pivotting
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grouping
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groupby("state")[['column']]
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merging datasets
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make sure the types match
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check dataframe size before and after
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try with how=inner and how=outer
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fuzzywuzzy
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package that does fuzzy matching on merging
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Graphing
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ggplot, bokeh, seaborn, matplotlib
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glue
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select's multiple data
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PDF sucks
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Tabulo - select a table out of PDF and it turns it into a CSV
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don't let notebooks get in the way of reusable code
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repeatability matters
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make, tup
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Open knowledge foundation bubbles; storm; spark
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blaze - panda like interface or querying large datasets
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To ORM or not to ORM
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Christine Spang
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Nylas
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mit
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casewise
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What is
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Why should use one
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when / where
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whch one
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bailed early on this as topics I well understood were being poorly presented
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docker in production open space
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stack1
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core os
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overlay open-vswitch
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zfs
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file system
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counsel - service discovery
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vulcand - front end routing
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stack2
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aws / s3
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zodb loadbalancing
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sensu - monitoring
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fluentd - hecka
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stack3
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mesos - ha and resource management
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aurora - health checking
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splunk forwarders
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marathon - scheduler to run on mesos
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spark open space
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SaltStack
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what is it
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Fast Communication
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remote execution
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makes money via car parts
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demo
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salt '*' test.ping
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the '*' is the target string
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the function
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test.ping
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salt '*' sys.listmodules
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sys.listfunctions sys
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sys.doc test.ping
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salt '*' pkg.install htop
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salt * pkg.install emacs
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targetting
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by default target via glob
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can do regex matches --pcre
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grains (static info about the minion)
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os info
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salt -G 'os_family:debian'
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groups = compound matches attached to a name
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managing states
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statefile
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yaml config file
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github.com/basepi/salt-vagrant-lxc
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bit.ly/salt-stack-pycon
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Lightening Talks: Saturday Afternoon
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That one weird thing about English
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A sentence:
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capital letter
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ends with a period
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often has: subject verb and subject
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cant just jam sentences together with a comma
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the sin is called the comma splice
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replacing pstats with ipython notebook
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using python to determine difference between amateur and professional violen players
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Quick Design Wins
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Karen Rustad
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Line-height
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better default is 1.75
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Text-width
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container { width: 800px; margin: 0 auto; }
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contrast
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default headers
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font-size: 4em;} h2 { font-size: 2em;}
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font face weights
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thin
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book
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normal
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bold
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ultrabold
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somadesign.ca
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google fonts
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grids
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try to keep your divs consistent column widths
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color
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value contrast is better
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black and white is ok
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@whoisaldeka
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github.com/aldeka/
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Code Comments- what are they good for
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refactor > code comment
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How do dolphins and whales hear
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marine environment
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low light
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3d
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sound travels faster in sea water
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marine env is getting noisier
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azosuls@bu.edu
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C3 under control
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Scalable MROs for large hiererchies
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computational pure mathematics
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SAGE
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sagemath.org
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multiple inherentence
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MRO
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MRO computed via the C3 algorithm
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cannot create a consistent method resolution order
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how to avoid MRO failures?
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set: consistent global order on your class
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search for consistent global order
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explitly set the subclass hierarchy you wish for
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Symbollic Literals
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open data science conference
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@dontusethiscode
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Playing with Python Bytecode
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import dis
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def add(a, b): return a+ b
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dis.dis(add)
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Existing tools for modifying python
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metaclasses
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descriptors
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exec/eval
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bytecode transformers
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codetransformer github
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Lightening Talks: Sunday Morning
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keyboard ergonomics
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no school typing
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layouts
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iso
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ansi
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numerical keyboard
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tenkeyless
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no numeric keypad
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good for mousing
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keyboard feeling is important
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deskthority.net/wiki
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genomics
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workflow
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recruitment
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data aquisition
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imputation
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genome wide imputation pipeline
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converts missing genome values into statistics to guess the missing basis
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A??T??A?G -> AATTTCAACG
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handles ~3500 intermediate files
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builds reports
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GWIP
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analysis
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regressions
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with 7 million datapoints
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linear regression
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glms
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gwips parralizes
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visualiazations
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manhattan plot++
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publication
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pgxcentre.github.io/gwip
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award winning adventure game in python3
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pyweek.org
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game competition
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October 2014 - theme was One Room
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he won
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The script
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restructured reST
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wanted the script to be executable
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DSL
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.. allow: stuff
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pygame works on python3
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DSL specific languages are cools
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bitbucket.org/lordmauve/goblit
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manage your science lab with Python
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pyvisa
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pyseral
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pyusb
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TCP/IP
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agile
hide
kanban
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columns
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limit works in progress
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functional programming ideas in python
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manish tomar
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@manishtomar
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Sunday Morning Keynotes
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Van Lindberg
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PSF president
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community
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capital assets
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product strateggy and dev
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r&d
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enterprise integration
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librares and sdks
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addons and tooling
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developer advocates / Evangelists
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overhead
leaf
it
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accounting
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human resources
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public relations
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finance
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legal
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events and logistics
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sales and marketing
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the problems
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mostly people
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time
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one full time employee
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3 part times
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everyone else are volunteers
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what can we do
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say thanks
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raise up and mentor others
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persevere when trying something new
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empathy
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a willingness to put yourself in others shoes and seeing the world through there eyes
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"Everyone you meet is fighting a battle you know nothing about. Be kind. Always." - Banksy
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Everyone is the hero of their own story
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Responsibility
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do your homework.
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find a way to contribute constructively
leaf
specifically identify changes that need to be made
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"it doesn't work is not a bug report. And 'this sucks' is not a feature request"
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advice
hide
building a community
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don't rush it
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default to openness
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build a culture of service
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greatest threat to the community
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multicore
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mobile
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package management/deployment
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javascript and go
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excel where python is weak
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go
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close to the metal
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good concurrency
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deployment model is great
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the problem
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anything that is written is dead code
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plan9 calling convention
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unlike 'rust'
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can't really extend the ecosystem - all or nothing in go
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hard to use go for what it is good and to python with what it is good
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python paradox
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no more the "risky choice"
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scala is more edgy
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greatest opportunity
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education
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bbc - microbit
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given out to every 11yr old
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Jacob Kaplan Moss
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Director of Security - Heroku
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11 years
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10 year ago - DC (2005)
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django - 10 years old
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"I don't deserve to be here"
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"the little hater" - Jay Smooth
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the youtube vid is great
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"Inventor of Django"
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"Co-creator of django"
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person who started on django a year after Adrian and Simon created
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Ann Trason
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The talent myth
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Keeps people out of tech
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Most fields don't require "passion"
leaf
runners don't need "innate passion"
leaf
programming isn't a "passion" or "talent" but a collection of aquired skills
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The talent myth drives people out of tech
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"the brilliant asshole"
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who is the 10x programmer
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the young white man archetype
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"there are all kinds of runners"
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all sizes
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shapes
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genders
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races
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all have different metrics
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Poster sessions
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see wam's photo-album
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Interactive Data for the Web
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sarah bird
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sarah@aptivate.org
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github/bdsarah
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birdsarah
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bokeh
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data viz library
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python vs javascript
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d3.js and many more
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seaborne / matplotlib
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web, interactive
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dynamic & data driven
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roots in data science
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can stay in python
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making frontend library
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uses canvas, so don't need to worry about blowing up SVG dom
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server-side processing
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real time updates
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new default
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write python on the server
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builds json
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bokehjs javascript
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canvas/html
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aptivate
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wateraid.org
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built in d3
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github.com/birdsarah/
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high level (charts)
leaf
from bokeh.charts import Line
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chart = Line(data)

show(chart)

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Line, Area, Bar, Heatmaps
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the data was a pandas data frame
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Make it shiny
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reductive approach
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args to define a palette
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remove gridlines
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width/height
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remove the tools
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and low level
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Plot object
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Add into the Plot glyph
leaf
glyphs are shapes
hide
adding the map
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from bokeh.moduls import ColumnDataSource
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source = ColumnDataSource(data)
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Tap tool
leaf
Hover tool
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Linked Selection
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Everything is python object
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source = ColumnDataSource(data)
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map_plot
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Widgets
leaf
Tabs
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Embedding
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embed_script, embed_div = components(plot, resources=Resources())
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Introducing bokeh server
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server to javascript REST service
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websocket connection too
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bokeh.properties import Instance
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Instance ties the web app to the viz
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really, a server for a slider
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Action framework
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OpenURL
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the server is awesome
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complex data manipulation
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downsampling
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stream your data
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ss
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Terminal Whispering
leaf
Do more than just print text with terminals
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terminals are cool
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pudb
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pdb like full screen terminal
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what are terminals
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emulate real terminals
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which in fact emulated teletypes
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which in fact emulated typewriters
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what bytes can be written
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ascii bytes
leaf
sys.stdout.buffer.write(b"some bytes")
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\n\t
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\r
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\v vertical
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\a
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terminal bell
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if terminal has an encoding, can send several bytes to display unicode
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ansi escape sequences
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\x1b[31m
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asdf - red
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move
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clear
leaf
hide
leaf
bold
leaf
red
leaf
wikipedia entry on ansi escape sequences
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coatibility layer
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termcap
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curses
leaf
tput
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ansi standardization efforts
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from blessings import Terminal
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wrapper around curses
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reading from keyboard
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turning off echo in python
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send keys immediatly
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ask for terminal size
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non-blocking input
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signals
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sigint
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sigstp
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sigwnch
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cooked, raw and cbreak
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in practice
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urwid
leaf
click
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clint
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commandline stuff
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ls in columns
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curtsie
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ptpython
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random cool stuff
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term
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@ballingt
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Sunday Afternoon Keynote
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Guido van Rossum: Gradual Typing for Python 3
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Guido van Rossum
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Ancient History
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2000: types-sig
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optional static typing talk
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type hint annotations
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2004-2005
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artima blogs on optional static typing
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generic types
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2006
hide
PEP3107: function annotations
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compromise: annotation syntax but no semantics
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2013
hide
Met Jukka Lehtosalo (mypy) at PyCon
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convinced to make mypy
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2014
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What python can learn from haskell
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mypy
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2015
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PEP 484: type hints
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proposal
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static type checker a seperate program
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closer to a lint tool than an interpretter
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function annotations for inline type hints
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stub files to annotate code you cannot change
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why
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find bugs sooner
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the larger your project, the more you need it
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helps spelunking code
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large teams are already static analysis
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google, dropbox building their own
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also products like semmle
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type hints
hide
help the type checker
leaf
in dynamic python, flow of objects is hard to follow
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serve as additional documentation
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help ides
leaf
improve suggestions
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improve interactive code checks
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why stubs
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py2 compatibility
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C extensions
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author unwilling to do it
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why a duck
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why a pep
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let the use mypy if they want to
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standard notation helps everyone
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code generation
leaf
not high on the prio list
leaf
cython might be able to use them
leaf
pypy and others have done fine without the type hints
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Type hints outline
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basics
hide
gradual typing
leaf
some code can be annotated, other nt
hide
Abscence of type info is roughly approximate to Any
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Any is at the top and bottom of class tree
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Any is a superclass of everything
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Any is a subclass of everything too
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typing.py
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only real change
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no new syntax
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no changes to other stdlib module
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from typing import Any, List
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annotations
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IDEOLOGY / Imposter Syndrome
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"I'm not a real programmer"
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Gary Bernhardt
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static Types
leaf
SML, OCaml, F#
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haskell
leaf
Rust
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NULL
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GOTO
hide
Pervert's Guide to Ideology
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movie
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CSE341 Dan Grosman (first half)
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destroyallsoftware.com/book
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PyCon 2016
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portland
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Tutorial: May28-29
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Conference: may 30-june1
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Sprints June 2-