So you want to write a framework? Accidental lessons from a successful project

Opening keynote from PyCon PH 2014

Transcript

1. So you want to write a framework? Accidental lessons from a successful project Dr Russell Keith-Magee PyCon PH 2014
5. I've got fingerprints elsewhere.
6. This isn't about Python.
7. This isn't about web frameworks.
8. Best of Breed vs Batteries Included
9. "Batteries Included" Frameworks "Everything comes in the box" One package to download/install Minimal dependencies No decisions to make Documentation on the parts
10. "Best of Breed" Frameworks Pick from existing selection of libraries Glue logic to tie them together Many dependencies Multiple decisions may be required Documentation on integration
12. Hybrids are possible.
13. Why pick one over the other?
14. History matters.
15. It's hard to be best of breed when the breed doesn't exist yet.
16. Ian Bicking and SQLObject http://bit.ly/bicking-goodbye
17. Picking "best of breed" early can be detrimental.
18. History matters.
19. Backwards compatibility
20. Time is relative.
21. “ A rule of thumb that has worked for me is that if I'm excited to play around with something it probably doesn't belong in production ” Maciej Ceglowski (Pinboard)
22. Backwards compatibility has a price.
23. Batteries Included can still be backwards incompatible.
24. Best of breed encourages you to pick and choose.
25. Is a choice of batteries really what is required?
26. "Batteries included" doesn't mean "Can't use other batteries".
27. Messaging matters.
28. Timing matters.
29. The 90% framework.
30. Out of the box experience matters.
31. http://goo.gl/Epzms
33. Implicit documentation
34. Models and Forms class MyUser(models.Model): name = models.CharField(max_length=100) age = models.IntegerField() date_of_birth = models.DateField() class MyForm(forms.Form): name = forms.CharField(max_length=100) age = forms.IntegerField() date_of_birth = forms.DateField()
35. Tools vs ecosystems
36. Jacob's Tractor
37. Tools vs ecosystems
38. Metcalfe's Law: The utility of a network increases with the square of it's participants.
39. Ecosystems
40. Microframeworks
41. Remember to share with the other children.
42. Sending the wrong signals.
43. Packaging systems matter.
44. Community matters.
45. Outreach is important.
46. Absent friends
47. http://bit.ly/malcolm-monkey-hat
48. http://bit.ly/malcolm-plays-spassky
49. Requiem in pace
50. “ A society grows great when old men plant trees whose shade they know they shall never sit in. ” Greek proverb
51. Kid, you can move mountains. (98 and ¾ percent guaranteed)
52. He's not the messiah....
53. Thanks! russell@keith-magee.com @freakboy3742 cecinestpasun.com djangoproject.com