pyqt4 初学 - QWidget: Must construct a QApplication before a QPaintDevice

dialog = simpleUI()
dialog.show()

QWidget: Must construct a QApplication before a QPaintDevice

pMainWindow = qg.QApplication( sys.argv )
dialog = simpleUI()
sys.exit( dialog.exec_() )	

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转载自blog.csdn.net/ksx_120999/article/details/86569217