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README 2010-04-25 6.8 kB 11 weekly downloads
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Current Release: 0.7 --------------- This is the 0.7 release of Pyjamas. Pyjamas comprises several projects, one of which is a stand-alone python-to-javascript compiler; other projects include a Graphical Widget Toolkit, such that pyjamas applications can run either in web browsers as pure javascript (with no plugins required) or stand-alone on the desktop (as a competitor to PyGTK2 and PyQT4). Features and enhancements of the stand-alone 0.7 series javascript compiler include: * the addition of generators (support for yield, by rewriting the function so that it can be re-called and continue from the previous state); the rewriting allows all browsers (not just firefox - the only browser with a javascript-native "yield" feature) to appear to have python "yield" functionality; * the beginnings of decorators support, and full support for properties, with the addition of property(); * some dramatic performance improvements due to a rewrite of for-loops; * improved support for import syntax (from . import module); * the addition of a built-in AST parser, use of which allows python 2.4 to compile programs with python 2.5 / 2.6 syntax into javascript; * addition of int and long types, and support for operator functions, so that e.g list multiplication by numbers and list addition now work, along with coercion between int, float and long types, and support for floating point exceptions including raising ZeroDivisionError; * reintroduction of pyjscompile (equivalent to gcc -c foo.c -o foo.o). This is in preparation for adding a separate linker command (equivalent to gcc *.o -o foo), at which point Pyjamas apps will be suitable for building using make, and Makefiles: .py.js: pyjscompile -o $< $@ Overall, this release is a significant "pythonic" upgrade: for full details, see the CHANGELOG. In the User-Interface suite, which is separate from the Pyjamas stand-alone python-to-javascript compiler, the features and enhancements include: * The beginnings of a User-Interface and DOM regression test suite, that is asynchronous and can generate and test the consequences of events. It works by recording, using Pyjamas-Desktop, the HTML created by adding and interacting with widgets and DOM (in "record" mode), then fetching that HTML back using AJAX when the tests are run by the Browsers. Care is taken to ensure that browsers that re-order Element Attributes are taken into consideration. * An SVG / VML Canvas Library (a port of GWTCanvas). This has been ported to pure python, and consequently work under Pyjamas-Desktop as well. * A Graphical Chart Library (a port of GChart). This has been ported to pure python, and consequently work under Pyjamas-Desktop as well. For the same speed optimisations present in GChart, GChart for Pyjamas can also use the python port of GWTCanvas. * A Google GMaps (v3) wrapper library. This wrapper library uses the Google GMaps javascript API, directly. There are over ten demos and examples that show how to use the API from Pyjamas. Unfortunately, the direct use of the GMaps javascript API precludes the use of Pyjamas-Desktop, as it is quite tricky for PyJD ports to interact (safely, if at all) with Javascript. Javascript can be run (through standard HTML methods), but initiation from Python and interaction through Python is tricky. Developers who may be expecting to use Google GMaps on Pyjamas Desktop should therefore assist in porting the Google GMaps Javascript API directly to Python. * An internal restructure of Event handling, similar to GWT 1.7, providing Focus, Mouse and Click "Mixin" modules so that developers creating their own widgets have a minimal amount of work to do. This redesign could only take place once Pyjamas supported multiple inheritance (added in 0.6). Pyjamas ------- Pyjamas 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. Pyjamas 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). Pyjamas also contains a Desktop Widget Set version, running as pure python, with three Desktop ports available. Using web browser technology startlingly provides an alternative to traditional Widget sets, such as PyQT4 and PyGTK2, with the advantage of having full support for HTML, CSS, Plugins and other web-related features already built-in. For the windows port, this can save users and developers around 30mb of downloads, as MSHTML is preinstalled on the Windows Operating System, as part of IE. For more information, see: http://pyjs.org http://pyjs.org/FAQ.html http://pyjs.org/features.html Known bugs: http://code.google.com/p/pyjamas/issues #290, #227, #228, #230, #304 Pyjamas-Desktop --------------- Pyjamas runs your python application in a Web Browser (as javascript). Pyjamas-Desktop runs exactly the same python application on the Desktop (as pure python). http://pyjd.org Release 0.6 of Pyjamas incorporated Pyjamas-Desktop directly into the Pyjamas Distribution. To use Pyjamas-Desktop there are three choices, with more planned [MacOSX PyObjC; KDE's PyKHTML]. All ports of Pyjamas-Desktop will require a JSON library to be installed: as there are plenty already, it is counter-productive to write yet another one. simplejson is recommended. 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. GNU/Linux, FreeBSD and other POSIX systems are strongly advised to use XULRunner for Pyjamas-Desktop: it is the most stable of the PyJD ports. 2) - PyWebKitGtk you will need a patched version of pywebkitgtk: http://code.google.com/p/pywebkitgtk/issues/detail?id=13 you will need a patched version of webkit: http://github.com/lkcl/webkit/16401.master Detailed build instructions are available here: http://wiki.github.com/lkcl/webkit/helping-with-16401master 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.
Source: README, updated 2010-04-25