创建一个包括菜单栏，工具栏，状态栏，文本编辑部件的经典GUI应用程序的骨架

效果如下：

代码如下：

 #!/usr/bin/python3
 # -*- coding: utf-8 -*-

 """
 This program creates a skeleton of
 a classic GUI application with a menubar,
 toolbar, statusbar, and a central widget.

 """

 import sys
 from PyQt5.QtWidgets import QMainWindow, QTextEdit, QAction, QApplication
 from PyQt5.QtGui import QIcon

 class Example(QMainWindow):

     def __init__(self):
         super().__init__()

         self.initUI()

     def initUI(self):

         textEdit = QTextEdit()
         self.setCentralWidget(textEdit)

         exitAct = QAction(QIcon('pictures\exit24.png'), 'Exit', self)
         exitAct.setShortcut('Ctrl+Q')
         exitAct.setStatusTip('Exit application')
         exitAct.triggered.connect(self.close)

         self.statusBar()

         menubar = self.menuBar()
         fileMenu = menubar.addMenu('&File')
         fileMenu.addAction(exitAct)

         toolbar = self.addToolBar('Exit')
         toolbar.addAction(exitAct)

         self.setGeometry(300, 300, 350, 250)
         self.setWindowTitle('Main window')
         self.show()

 if __name__ == '__main__':

     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())