> On Apr 6, 2005 2:24 PM, Phil Thompson <[EMAIL PROTECTED]> > wrote: >> From time to time we get commissioned to develop Python bindings for Qt >> based widget sets. These often come with examples and part of the work >> is >> to port those examples to Python. We then end up with C++ and Python >> implementations with the same structure, the same functionality, and >> calling the same API. Any difference in the amount of code is purely >> down >> to "language overhead". >> >> Below is a comparison of the numbers of lines of code for a number of >> such >> examples. For the C++ implementations I have excluded all .pro files and >> all qmake and moc generated files. >> >> C++ Python Reduction >> example_1 509 318 38% >> example_2 871 516 41% >> example_3 225 132 41% >> example_4 142 72 49% >> example_5 615 363 41% >> example_6 56 46 18% >> example_7 1445 764 47% >> example_8 536 312 42% > > Hi Phil, > These are indeed nice results. But how is the performance of the > python implemented widgets? I've never done one myself and I wonder if > there is any visible speed difference.
You've misunderstood - I'm talking about wrappers for C++ implementations of Qt based widgets, so speed isn't an issue. > By the way, are there any Python-implemented widgets available on the > net? There are some nice widgets in KDE (like Date selector), I would > like to integrate into my application. But I don't want my application > depend on PyKDE, since I want it to be portable on Unix, Mac OS X and > Windows. I have only ever seen one pure Python implementation of a widget - some sort of dial - but I can't track down a reference to it. PyQt for Qt 2 includes a port of the Qt themes example which seemed fine speed-wise - only a toy though. Of course, because Python is dynamic, you can delay decisions as to which date selector to use until run-time. Implement a generic date selector that derives from the KDE selector if it is installed or the standard Qt selector if not. I think this is what the eric3 IDE does. Phil _______________________________________________ PyKDE mailing list [email protected] http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
