Thinking Outside The Box

Keynote for EuroPython 2013.

Transcript

1. ThinkinG - = outside The box
2. Hello, I'm Armin! I do Computers - with Python. Currently at Fireteam / Splash Damage. We do Internet for Pointy Shooty Games. c w
3. q t t j j d
4. the box is comfortable X
5. the comfort is dangerous l
6. the 9 dots puzzle 0 j 5 (and things of similar nature)
7. h - W < å ≥ h ≥ U using exactly 4 straight lines, without retracing or removing one's pen from the paper connect the dots j
8. h - W < å ≥ h ≥ U using exactly 4 straight lines, without retracing or removing one's pen from the paper connect the dots j
9. g i know it's cliché Ç
10. J the six thinking hats
11. J the six thinking hats This
12. the majority is always wrong: congratulations; you're now a cynical asshole 7 z “ ”
13. a change of environment 1 z m
14. c computer games
15. ˚ 4 * this graph is not very scientific h ≥ Online
16. ˚ 4 * this graph is not very scientific python!!!11 h ≥ Online
17. community influences your thinking . a - ∫ Î
18. C++ good; Scripting Languages Bad u
19. ... if it takes you 30 minutes to do a one line change then you obviously would not want to have runtime type checks ... E
20. it's too easy to dismiss something on fringe or outdated experience alone
21. • never underestimate how much your environment/community influences you 1
22. • never underestimate how much your environment/community influences you 1 (unfortunately that also includes things like “the GIL is not a problem")
23. asking the right questions 2 j 5
24. the wrong questions are easy to spot on others a - ˚ 4
25. <redacted> how do I do something after return render_template(...) if I don't want to register teardown_request for all requests. J
26. • he was looking for celery / message queue ©
27. • first expectation was that the user wanted to change the HTTP response 0
28. • teardown_request would not have worked anyways O
29. I don't want my user to wait while I do some processing on his data v “ ” better:
30. t j the box was Flask
31. how to ask the right questions2 - 5 B
32. • assume you already started out wrong • describe the •actual• problem =
33. How do I use Websockets with Flask? z “ ”
34. How do I notify my user about changes with low latency. 6 better: “ ”
35. 5 question leaves room for the answer
36. (a) Server-sent events via WSGI (b) application <-> redis <-> persistent connection server Ô bit.ly/pypush
37. f Jump on IRC help out other people < >
38. questioning the right things 3 z m
39. the worst parts in my libraries are the ones where I took the design from elsewhere O
40. it's not because I know better ... ∆ Ò
41. • most things have some design behind • as people copy it, the original design gets obscured and forgotten • the original design might no longer apply 1
42. • starting something new? • question everything! ˝
43. not with the intention of proving existing design wrong; with the intention of understanding it. 9
44. 9 paradigm shifts 4 F
45. Many times we don't even realize that things were an example of thinking outside the box. (a) "echo" -> Request/Response objects (b) Interactive Interpreters 9
46. That's also what makes it hard to find examples now ... 9
47. every idea is a rehash don't get too excited when you feel all "obviously ..." sometimes all that's necessary is transposing a concept from one industry to the other. 9
48. 9 interesting examples 5 F
49. • Mill Processor: • Basic Block: One entry, one exit. • Break instruction bundles in half • Two decoders, one moves left from EBB entry point, one moves to the right =
50. • Mill Processor: • Basic Block: One entry, one exit. • Break instruction bundles in half • Two decoders, one moves left from EBB entry point, one moves to the right = two independent units, two separate caches
51. =a High-level Queues for Request Handling Stateful Frontend Servers Stateless Workers
52. • Sending around signed data • Cookies • Access/Refresh Tokens • Activation Links • Offers ˆ
53. • The Rust Programming Language • Memory ownership tracking 1 (and otherwise just steal from C++, C, Python, Ruby, Haskell and Scheme)
54. • Spotify's Native/Web Bridge • spawns HTTP server on localhost:XXXXX • provides OAuth bridge • JavaScript authenticates with local server, sends commands and retrieves updates. c
55. That's it; Now ask questions ? @mitsuhiko lucumr.pocoo.org/talks gittip.com/mitsuhiko y y y d
56. calibration slide -- 2 2 2 2 2 2 c