The document discusses various Python bindings that can be used to create Ubuntu apps with Python, including PyQt, PySide, and PyOtherSide. PyQt and PySide are described as traditional bindings that are synchronous by default and can have slow startup times. PyOtherSide is presented as an alternative that allows for asynchronous calls and has a smaller size and faster startup time than the other options. The document provides details on the pros and cons of each binding and demonstrates how to integrate PyOtherSide into apps for desktop and mobile platforms like Ubuntu phones.

1. Create ubuntu apps with python
Danial Behzadi
dani.behzi@ubuntu.com

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ubuntu SDK

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Python bindings for Qt
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PyQt
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PySide
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PyOtherSide

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PyQt
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Pros
– GPL license
– Qt 4 & 5
– Python 2 & 3
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Cons
– Synchronous by default
– Slow startup
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Riverbank Computing in 1998
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Cpython + Python code + Bindings + Qt
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Python Interpreter uses Qt to display UI

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PySide
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Pros
– Python 2 & 3
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Cons
– Synchronous by default
– Big size (> 15 MiB)
– Slow startup
– Qt 4 only
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Nokia in 2009
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Cpython + Python code + Bindings + Qt
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Python Interpreter uses QML to display UI
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LGPL license

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PyOtherSide
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Pros
– Asynchronous calls
– Small size (< 150 KiB)
– Fast startup
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Cons
– BSD license
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Thp (from Mer) in 2011
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Qt Plugin + Python library
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QML as frontend, uses Python as backend
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Qt 5 and Python 3

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PyOtherSide Platforms
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Desktop (GNU/Linux, Windows, Mac, etc.)
– Fully Supported
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GNU/Linux phones (Ubuntu, Sailfish)
– Fully Supported
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Other phones
– Android: Ship Python 3, Qt 5 and PyOtherSide in app
– Blackberry: Ship Qt 5 and PyOtherSide in app

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PyOtherSide API
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QML Methods
addImportPath(p)
setHandler(e, c)
importModule(n, c)
call(f, a, c)
evaluate(expr)
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QML Signals
recieved(data)
error(traceback)
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Python Module
import pyotherside
pyotherside.send(*args)
pyotherside.atexit(f)

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Sample code and explanation
Watch it live!

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Thanks!