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状态和菜单栏

import sysfrom PyQt5.QtWidgets import QMainWindow, QAction, qApp, QApplicationfrom PyQt5.QtGui import QIconclass Example(QMainWindow):    def __init__(self):        super().__init__()        self.initUI()    def initUI(self):                textEdit = QTextEdit()        self.setCentralWidget(textEdit)        exitAction = QAction(QIcon('python.jpg'), 'Exit', self)        exitAction.setShortcut('Ctrl+Q')        exitAction.setStatusTip('Exit application')        exitAction.triggered.connect(self.close)        self.statusBar().showMessage('Ready')        menubar = self.menuBar()        # 添加菜单                fileMenu = menubar.addMenu('&File')        fileMenu.addAction("New")        copyAction = QAction("Copy", self)        copyAction.setShortcut("Ctrl+C")        fileMenu.addAction(copyAction)        edit = fileMenu.addMenu("Edit")        edit.addAction("Cut")        edit.addAction("Paste")        fileMenu.addAction(exitAction)        self.setGeometry(300, 300, 300, 200)        self.setWindowTitle('Menubar')        self.show()if __name__ == '__main__':    app = QApplication(sys.argv)    ex = Example()    sys.exit(app.exec_())

import sysfrom PyQt5.QtWidgets import QMainWindow, QTextEdit, QAction, QApplicationfrom PyQt5.QtGui import QIconclass Example(QMainWindow):    def __init__(self):        super().__init__()        self.initUI()    def initUI(self):                textEdit = QTextEdit()        self.setCentralWidget(textEdit)        exitAction = QAction(QIcon('python.jpg'), 'Exit', self)        exitAction.setShortcut('Ctrl+Q')        exitAction.setStatusTip('Exit application')        exitAction.triggered.connect(self.close)        self.statusBar().showMessage('Ready')        menubar = self.menuBar()        # 添加菜单                fileMenu = menubar.addMenu('&File')        fileMenu.addAction("New")        copyAction = QAction("Copy", self)        copyAction.setShortcut("Ctrl+C")        fileMenu.addAction(copyAction)        edit = fileMenu.addMenu("Edit")        edit.addAction("Cut")        edit.addAction("Paste")        fileMenu.addAction(exitAction)        #添加工具栏        toolbar = self.addToolBar('Exit')        toolbar.addAction(exitAction)        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_())

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