pyqt4 执行问题咨询

1. 
   
2. 
   
3. from Ui_ea_ui import Ui_Dialog
   
4. 
   
5. class export(QDialog, Ui_Dialog):
   
6.     def __init__(self, parent = None):
   
7.         QDialog.__init__(self, parent)
   
8.         self.setupUi(self)
   
9. 
   
10.     @pyqtSignature("")
    
11.     def on_pushButton_2_clicked(self):
    
12.           self.connect(self.pushButton_2,QtCore.SIGNAL('clicked()'), QtGui.qApp, QtCore.SLOT('quit()'))
    
13. 
    
14. if __name__ == "__main__":
    
15.     app = QtGui.QApplication(sys.argv)
    
16.     ea = ea_export()
    
17.     ea.show()
    
18.     sys.exit(app.exec_())
    

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