Snakes in a browser - Speaker Deck

Slide 1

Slide 1 text

Snakes in a Browser Dr Russell Keith-Magee PyOhio 2016

Slide 2

Slide 2 text

Snakes in a Browser Dr Russell Keith-Magee PyOhio 2016

Slide 3

Slide 3 text

No content

Slide 4

Slide 4 text

No content

Slide 5

Slide 5 text

Quo vadimus?

Slide 6

Slide 6 text

2005

Slide 7

Slide 7 text

A Django project, c.2005 Browser

Slide 8

Slide 8 text

A Django project, c.2005 Models Browser

Slide 9

Slide 9 text

A Django project, c.2005 Views Models Browser

Slide 10

Slide 10 text

A Django project, c.2005 Forms V Views Models Browser

Slide 11

Slide 11 text

A Django project, c.2005 URLs Forms V Views Models Browser

Slide 12

Slide 12 text

A Django project, c.2005 Template URLs Forms V Views Models Browser

Slide 13

Slide 13 text

A Django project, c.2005 Template URLs Forms V Views Models memcached Browser

Slide 14

Slide 14 text

A Django project, c.2016 Template URLs Forms V Views Models memcached Browser

Slide 15

Slide 15 text

A Django project, c.2016 Template URLs Forms V Views Models memcached Browser V

Slide 16

Slide 16 text

A Django project, c.2016 Template URLs Forms V Views Models memcached API V Browser V

Slide 17

Slide 17 text

A Django project, c.2016 Template URLs Forms V Views Models memcached API API V Browser V V  V

Slide 18

Slide 18 text

A Django project, c.2016 Template URLs Forms V Views Models memcached API API V Browser V V  V

Slide 19

Slide 19 text

A Django project, c.2016 Template URLs Forms V Views Models memcached API API V Browser V V  V

Slide 20

Slide 20 text

Rich client frameworks

Slide 21

Slide 21 text

Isomorphic Javascript Development

Slide 22

Slide 22 text

Integrating with Python

Slide 23

Slide 23 text

Isomorphic Javascript Development

Slide 24

Slide 24 text

Isomorphic Javascript Development

Slide 25

Slide 25 text

Analyse requirements Browser

Slide 26

Slide 26 text

Analyse requirements Browser

Slide 27

Slide 27 text

Analyse requirements Browser

Slide 28

Slide 28 text

Analyse requirements V Browser V

Slide 29

Slide 29 text

Analyse requirements V Browser V V  V

Slide 30

Slide 30 text

Everything old is new again

Slide 31

Slide 31 text

Revised Web app structure V Models Browser V V  V

Slide 32

Slide 32 text

Revised Web app structure V Models Browser V Views V  V

Slide 33

Slide 33 text

Revised Web app structure Controller V Models Browser V Views V  V

Slide 34

Slide 34 text

Model - View - Controller

Slide 35

Slide 35 text

API-first development

Slide 36

Slide 36 text

High latency connections or No connection at all

Slide 37

Slide 37 text

Python in the browser

Slide 38

Slide 38 text

Brython Skulpt PyPy.js

Slide 39

Slide 39 text

Example

Name: Click!

from browser import document as doc, alert def echo(*args): alert("Hello %s !" % doc["data"].value) doc["test"].bind("click", echo)

Slide 40

Slide 40 text

Analysing requirements

Slide 41

Slide 41 text

.pyc files and bytecode

Slide 42

Slide 42 text

Batavia

Slide 43

Slide 43 text

Example >>> def clean(username): ... return username.lower() >>> clean.__code__


>>> clean.__code__.co_code
b'|\x00\x00j\x00\x00\x83\x00\x00S'
>>> import base64
>>> base64.encodebytes(clean.__code__.co_code)
b'fAAAagAAgwAAUw==\n'

Slide 44

Slide 44 text

Example: DOM access import dom div = dom.document.getElementById('output') div.innerHTML = div.innerHTML + '\n\nHello, World!\n\n'

Slide 45

Slide 45 text

Unexpected consequences

Slide 46

Slide 46 text

Python on Mobile devices

Slide 47

Slide 47 text

Toga

Slide 48

Slide 48 text

Toga for web?

Slide 49

Slide 49 text

freakboy3742.pythonanywhere.com

Slide 50

Slide 50 text

Ágætis byrjun

Slide 51

Slide 51 text

Possible isn't enough

Slide 52

Slide 52 text

russell@keith-magee.com @freakboy3742 cecinestpasun.com pybee.org freakboy3742.pythonanywhere.com