Snakes in a browser

We all know that Python and Django can be used to write server-side software, but what about the client side? What about the browser? Can you use Python to power client-side interactions? Can you deploy Python logic (such as validation logic) on both the client and the server?

Video: https://www.youtube.com/watch?v=9W2sFRrNJ9A

Transcript

1. Snakes in a Browser Dr Russell Keith-Magee PyOhio 2016
2. Snakes in a Browser Dr Russell Keith-Magee PyOhio 2016
5. Quo vadimus?
7. A Django project, c.2005 Browser
8. A Django project, c.2005 Models Browser
9. A Django project, c.2005 Views Models Browser
10. A Django project, c.2005 Forms V Views Models Browser
11. A Django project, c.2005 URLs Forms V Views Models Browser
12. A Django project, c.2005 Template URLs Forms V Views Models Browser
13. A Django project, c.2005 Template URLs Forms V Views Models memcached Browser
14. A Django project, c.2016 Template URLs Forms V Views Models memcached Browser
15. A Django project, c.2016 Template URLs Forms V Views Models memcached Browser V
16. A Django project, c.2016 Template URLs Forms V Views Models memcached API V Browser V
17. A Django project, c.2016 Template URLs Forms V Views Models memcached API API V Browser V V  V
18. A Django project, c.2016 Template URLs Forms V Views Models memcached API API V Browser V V  V
19. A Django project, c.2016 Template URLs Forms V Views Models memcached API API V Browser V V  V
20. Rich client frameworks
21. Isomorphic Javascript Development
22. Integrating with Python
23. Isomorphic Javascript Development
24. Isomorphic Javascript Development
25. Analyse requirements Browser
26. Analyse requirements Browser
27. Analyse requirements Browser
28. Analyse requirements V Browser V
29. Analyse requirements V Browser V V  V
30. Everything old is new again
31. Revised Web app structure V Models Browser V V  V
32. Revised Web app structure V Models Browser V Views V  V
33. Revised Web app structure Controller V Models Browser V Views V  V
34. Model - View - Controller
35. API-first development
36. High latency connections or No connection at all
37. Python in the browser
38. Brython Skulpt PyPy.js
39. Example <p>Name: <input id="data"> <button id="test">Click!</button> </p> <script type="text/python"> from browser import document as doc, alert def echo(*args): alert("Hello %s !" % doc["data"].value) doc["test"].bind("click", echo) </script>
40. Analysing requirements
41. .pyc files and bytecode
42. Batavia
43. Example >>> def clean(username): ... return username.lower() >>> clean.__code__ <code object clean at 0x.....> >>> clean.__code__.co_code b'|\x00\x00j\x00\x00\x83\x00\x00S' >>> import base64 >>> base64.encodebytes(clean.__code__.co_code) b'fAAAagAAgwAAUw==\n'
44. Example: DOM access import dom div = dom.document.getElementById('output') div.innerHTML = div.innerHTML + '\n\nHello, World!\n\n'
45. Unexpected consequences
46. Python on Mobile devices
47. Toga
48. Toga for web?
49. freakboy3742.pythonanywhere.com
50. Ágætis byrjun
51. Possible isn't enough
52. russell@keith-magee.com @freakboy3742 cecinestpasun.com pybee.org freakboy3742.pythonanywhere.com