Thanks, Nathan, after poking around a bit more I found a similar solution: app = QApplication.instance() if app == None: app = QApplication(sys.argv)
This works! On Wed, May 23, 2012 at 5:03 PM, Nathan Smith <[email protected]>wrote: > 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 >> >> >
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