勾选菜单

#!/usr/bin/python3
# -*- coding: utf-8 -*-
"""
ZetCode PyQt5 tutorial 
This program creates a checkable menu.
Author: Jan Bodnar
Website: zetcode.com 
Last edited: August 2017
"""
import sys
from PyQt5.QtWidgets import QMainWindow, QAction, QApplication
class Example(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()
    def initUI(self):     
        self.statusbar = self.statusBar()
        self.statusbar.showMessage('Ready')
        menubar = self.menuBar()
        viewMenu = menubar.addMenu('View')
        viewStatAct = QAction('View statusbar', self, checkable=True)
        viewStatAct.setStatusTip('View statusbar')
        viewStatAct.setChecked(True)
        viewStatAct.triggered.connect(self.toggleMenu)
        viewMenu.addAction(viewStatAct)
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Check menu')  
        self.show()
    def toggleMenu(self, state):
        if state:
            self.statusbar.show()
        else:
            self.statusbar.hide()
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

viewStatAct = QAction('View statusbar', self, checkable=True)

viewStatAct.setChecked(True)

def toggleMenu(self, state):
    if state:
        self.statusbar.show()
    else:
        self.statusbar.hide()