On Sat, 4 Apr 2009 11:17:11 +0200, Detlev Offenbach <det...@die-offenbachs.de> wrote: > Hi, > > that is good news. Do you have any experience how the performance of > programs > differ between Python v3 and Python v2. Are there any hints about how to > write a program, that runs with both variants of Python (e.g. writing > compatibility methods that e.g. turn print() calls into print statements > for > v2 or that turn unicode() to str() for v3).
This is the migration path: * Upgrade to Python 2.6. * Declare Python 2.5 unsupported (which might or might not be a problem). * Start using all possibile __future__ imports in your code (print_function, unicode_literals, etc.), adjusting all your code accordingly. * Run your program using "python -3" and fix all the warnings it spouts, by rephrasing your code. * At this point, if you run 2to3, you should get perfectly working python 3 code. You can keep editing the Python 2.6 version and machine-generate the 3.x version until you drop support for 2.x. * If your generated 3.x code does not fully work, it might be a bug in any of the following: * Missing warning in "python -3" * Missing converter code in 2to3 * Bug in 2to3 In this case, you should report this problem to Python developers with a testcase, so that they can fix it. -- Giovanni Bajo Develer S.r.l. http://www.develer.com _______________________________________________ PyQt mailing list PyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
