Pyjs

Pyjs is a port of Google Web Toolkit to Python, and thus enables the development of Rich Media AJAX applications in Python, with no need for special browser plugins. Pyjs contains a stand-alone python-to-javascript compiler, and also a Widget Set API that looks very similar to Desktop Widget Set APIs (such as PyQT4 or PyGTK2).

Pyjs also contains a Desktop Widget Set version, running as pure python, with three useable Desktop ports available. With web-engine technology at it's core, HTML, CSS, plugins and other related features work out-of-the-box.

For more information and documentation, see:

• http://pyjs.org
• https://github.com/pyjs/pyjs/wiki

For issue tracking:

• https://github.com/pyjs/pyjs/issues

Mailing list:

• https://groups.google.com/group/pyjs-users

IRC:

Server

irc.freenode.net

Channel

#pyjs

Pyjs-Compiler

Pyjs-Compiler tools are a collection of tools that related to

• compiling python code to java script
• linking compiled javascript modules into complete application
• to convert java to python, etc.

Pyjs-Compiler runs your python application in a Web Browser (as javascript).

Pyjs-Widgets

Pyjs-Widgets are a collection of GUI widget libraris that can be run natively as part of Pyjs-Native or compiled by Pyjs-Compiler to run in a browser.

Pyjs-Desktop

Pyjs runs your python application in a Web Browser (as javascript). Pyjs-Desktop runs exactly the same python application on the Desktop (as pure python). There are currently three engine choices, with alternatives in development.

All ports of Pyjs-Desktop require a JSON library: simplejson is recommended if the version of python is 2.5 or less. Python 2.6 and above come with a json library installed by default.

1. XULRunner

   Install hulahop and python-xpcom. Hulahop, from OLPC SugarLabs, is distributed with both Debian and Ubuntu; python-xpcom is part of XULRunner and is also distributed with both Debian and Ubuntu. Other users should investigate the installation instructions for python-xpcom and hulahop for the operating system of their choice on the appropriate web sites.

   Older versions of XULRunner must be used: versions 1.9.0 or 1.9.1 are known to be suitable, as is version 9.0. Versions 10 and above are known to segfault.

2. GIWebKit (GObject Introspection)

   A 95% functional binding enabled via the dynamic GObject/Python bindings produced by https://wiki.gnome.org/GObjectIntrospection after scanning the annotated WebKit sources. This backend is missing a critical piece, window.addEventListener, from https://bugs.webkit.org/show_bug.cgi?id=77835 but development is in progress to implement the missing binding via ctypes instead, due to a lack of interest by WebKit.

   This is intended to supercede XULRunner as the default on Linux once ready.

   GIWebKit must be explicitly enabled. create a $HOME/.pyjd/pyjdrc file containing the following two lines:

   [gui] engine=giwebkit

3. MSHTML

   For Windows users, all that's required, other than installing python and Internet Explorer, is one further tiny package: Win32 "comtypes".

   Win32 "comtypes" can be downloaded here:
   • http://sourceforge.net/projects/comtypes/

   Unlike the other ports, which can comprise a whopping great bundle of anything up to 30mb in size, the MSHTML port literally requires nothing more than comtypes, thanks to the far-sighted design of the MSHTML Trident Engine and its extensive COM interface.

Installation Dependencies

1. python
2. virtualenv - a python toolset that allows multiple python sandox installations
3. pip - an alternative to the standard python installation tools

Installation

1. Download and unzip/untar the pyjs.tar.gz file

2. Change into the pyjs root directory

   cd <pyjsroot>

3. Optional step to create your own virtual python sandbox for development purposes

virtualenv mypython

This will create a mypython directory and install sandboxed virtual python installation at

<pyjsroot>/mypython

4. Install Pyjs-Tools, Pyjs-Pyjamas and all dependencies

<pyjsroot>/mypython/bin/pip install <pyjsroot>

OR the following if you want to develop and modify Pyjs-Compiler or Pyjs-Widgets

themselves

<pyjsroot>/mypython/bin/pip install -e <pyjsroot>

You are now ready to use Pyjs. Scripts for compiling python code to Javascript as well as compiling applications will be installed into the mypython sandbox <pyjsroot>/mypython/bin/pyjscompile <pyjsroot>/mypython/bin/pyjsbuild <pyjsroot>/mypython/bin/pyjampiler