Am Montag, 12. November 2007 20:55:20 schrieb Hans-Peter Jansen: > Am Montag, 12. November 2007 schrieb Sibylle Koczian: > > So I looked around and saw that I had this: > > > > def main(args): > > app = QtGui.QApplication(args) > > if not visa_conn(): > > sys.exit(1) > > visa_mf = VisaMF() > > visa_mf.show() > > sys.exit(app.exec_()) > > > > if __name__ == '__main__': > > main(sys.argv[1:]) > > > > while "cachedtable.py" has no separate main function and calls the app > > constructor with the full list sys.argv. Doing the same in my own example > > seems to do the trick. But why? > > I will (hopefully) leave a more satisfying answer to the experts, but > omitting sys.argv[0] doesn't make any sense to me anyway. Maybe the process > name is used internally for creating the default connection name, and > creates a None, NULL, whatever mismatch on close later in this case. > > You may want to experiment a bit with faked sys.argv args, e.g.: [], [''], > ['xxx'], and let us know about the outcome. Using a different database > backend would also be interesting. >
I did, and the content of the argument list seems to be quite unimportant: app = QtGui.QApplication(args) with an arbitrary list "args" works without error message - as long as I don't use a separate "main" function. That seems to be the important difference, not the arguments to the QApplication constructor. Which leads again to the question: why? What's wrong with such a function? I will try to find out more: can I put part of the code into main(), but not all of it? Can I use such a function, if I don't call it "main()"? And I will certainly use another database backend (firebird), but at the moment I doubt very much if that will make any difference. It's more interesting to try PyQt applications not using a database with and without a separate "main()". Very mystified, Sibylle -- Dr. Sibylle Koczian Fasanenstraße 12 82293 Mittelstetten _______________________________________________ PyQt mailing list [email protected] http://www.riverbankcomputing.com/mailman/listinfo/pyqt
