PyQt5--EventHandler

 # -*- coding:utf-8 -*-
 '''
 Created on Sep 14, 2018

 @author: SaShuangYiBing
 '''
 import sys
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import QApplication,QWidget

 class New_test(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()

     def initUI(self):
         self.setGeometry(300,300,250,150)
         self.setWindowTitle('Event Handler')
         self.show()

     def keyPressEvent(self, e):
         if e.key() == Qt.Key_Escape:
             self.close()

 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = New_test()
     sys.exit(app.exec_())

程序运行后窗口打开，此时按  Ctrl+Q 组合键即可关闭该窗口