# When I close this app PySide aborts with the following message:
#
# Fatal Python error: PyEval_SaveThread: NULL tstate                            
# Aborted                                                                       

import sys

if len(sys.argv) == 1:
    print "Using PySide"
    from PySide import QtGui
else:
    print "Using PyQt4"
    import sip
    from PyQt4 import QtGui

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    window = QtGui.QWidget()
    window.show()
    sys.exit(app.exec_())