On Sun, 01 Aug 2010 19:49:11 +0200, Linos <i...@linos.es> wrote: > Hello, > i don't know if this is a bug or an intended behavior but i am using in > my > machine Arch Linux pyqt 4.7.4 with sip 4.10.5 and in older versions the > behavior > was: > > combo = QComboBox() > if combo: > print "exists" > else: > print "is none" > > would print "exists" and now it prints "is none", i suppose it is a bug > because > the same test with QLabel still print "exists", i have not tested other > classes > though.
It's a side effect of an intended change that is triggering a bug in your code. QComboBox() now has a __len__() method which changes the behaviour of "if combo". If you want to test for None then you should always do so explicitly... if combo is None: print "is none" else: print "exists" Phil _______________________________________________ PyQt mailing list PyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt