Hi Jason, PySide only supports creating a single persistent instance of QApplication. This singleton exists forever and cannot be deleted. If you have a function that tries to create a QApplication, then I recommend placing that creation inside of a try/except block:
try: app = QtGui.QApplication(sys.argv) except RuntimeError: app = QtCore.QCoreApplication.instance() This will either create a new QApplication instance if one does not exist, or return the current QApplication instance if one already does exist. Nathan On Wed, May 23, 2012 at 3:21 PM, Jason Augustyn <[email protected]>wrote: > Hi all, I am new to using PySide and have been working through the novice > tutorials, which are great. One problem - I cannot re-run a script without > exiting the Python shell altogether. Re-running gives the RuntimeError: A > QApplication instance already exists. > > I have searched for a solution and found an old bug tracker ticket from > someone with a similar problem. The suggested solution was to upgrade to > PySide 1.0.4 and the ticket was marked as invalid. Obviously that doesn;t > work, as I'm running the newest version of PySide and still have the > problem. Any suggestions? I am using IPython on a Mac OSX 10.7. > > Thanks! > > Jason > > _______________________________________________ > PySide mailing list > [email protected] > http://lists.qt-project.org/mailman/listinfo/pyside > >
_______________________________________________ PySide mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/pyside
