The Perils Of Software Engineering

Transcript

1. Andrew Godwin @andrewgodwin PERILS OF THE SOFTWARE ENGINEERING

2. Andrew Godwin Hi, I'm Django Core Developer Senior Engineer at

   Far too many hobbies

3. "Perils"

4. Computer Science ≠ Software Engineering

5. Engineering Mechanical Civil Software Chemical Materials

6. Mechanical Engineering https://www.flickr.com/photos/mariaeklind/

7. Nondeterministic

8. Cost of Entry

9. Civil Engineering

10. Timescales

11. Cost of Failure

12. Aerospace Software Engineering

13. Cost of Failure

14. Failure: When, not if

15. Margaret Hamilton, 1969

16. Apollo 11 LM, "Eagle"

17. Web/App Software Engineering

18. Quick to build and test

19. Minimal equipment costs

20. Well-paid

21. Well-paid

22. Explicit is better than Implicit

23. Code Indirection

24. class MyView(View): def get(self, request): return self.render(request, "template.html")

25. class MyView(FormView, AuditMixin, OtherMixin): def get(self, request): return self.render(request, "template.html")

    class AuditMixin(BaseAuditor, AdditionalStuff): ... class OtherMixin(MyObject, SomethingElse): ...

26. Async Uncertainty

27. def async_handler(): with open("my_file.txt", "r") as fh: write_socket(1, fh.read()) redis.incr("key1",

    2)

28. Schemas

29. { "id": 342, "name": "David", "weight": 74, } { "id":

    342, "name": "Ellie", "weight": "85kg", } { "id": 342, "nom": "Frankie", "weight": 77, } { "id": 342, "name": "Frankie", "weight": -67, }

30. Clever code is bad Maintainable code is good

31. xs = [number for inner in nested if len(inner) >

    2 for number in inner]

32. for inner in nested: if len(inner) > 2: for number

    in inner: xs.append(number)

33. Explore and Discard

34. There is no perfect solution

35. Throwing everything away rarely works

36. Backwards compatability is your friend

37. Nobody is a genius; we're all mediocre

38. Argue over code, not over ideas

39. Well-paid

40. 10 years? 100 years? 1000 years?

41. Who will access it?

42. What format will it be?

43. Is it even important?

44. Over thousands of years, the machine memories have been filled

    with programs that can help “ “ A Deepness In The Sky Vernor Vinge

45. Engineering is collaborative

46. Build well.

47. Thanks. Andrew Godwin @andrewgodwin