Snakes in a browser - Speaker Deck

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Snakes in a Browser Dr Russell Keith-Magee PyOhio 2016

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Snakes in a Browser Dr Russell Keith-Magee PyOhio 2016

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Quo vadimus?

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2005

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A Django project, c.2005 Browser

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A Django project, c.2005 Models Browser

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A Django project, c.2005 Views Models Browser

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

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

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

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

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

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

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

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

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

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

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Rich client frameworks

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Isomorphic Javascript Development

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Integrating with Python

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Isomorphic Javascript Development

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Isomorphic Javascript Development

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Analyse requirements Browser

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Analyse requirements Browser

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Analyse requirements Browser

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Analyse requirements V Browser V

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Analyse requirements V Browser V V  V

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Everything old is new again

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Revised Web app structure V Models Browser V V  V

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

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

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Model - View - Controller

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API-first development

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High latency connections or No connection at all

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Python in the browser

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Brython Skulpt PyPy.js

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Example

Name: Click!

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

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Analysing requirements

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.pyc files and bytecode

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Batavia

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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'

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

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Unexpected consequences

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Python on Mobile devices

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Toga

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Toga for web?

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freakboy3742.pythonanywhere.com

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Ágætis byrjun

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Possible isn't enough

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[email protected] @freakboy3742 cecinestpasun.com pybee.org freakboy3742.pythonanywhere.com