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_())