PyQt 菜单栏的使用

import sys
from PySide6 import QtCore,QtWidgets
from PySide6.QtWidgets import *
from menu_ui import Ui_MainWindow //导入ui


class menu(QMainWindow):
    def __init__(self):
        super().__init__()    
        self.ui = Ui_MainWindow()      
        self.ui.setupUi(self) 
        self.__create_connections()
        self.ui.actionOpen.setShortcut('alt+o') //设置快捷方式

    def __create_connections(self):              
        self.ui.actionOpen.triggered.connect(self.open_file)   //信号     


    def open_file(self):        
        fname,_ = QFileDialog.getOpenFileName(self,"打开文件", '.')
        if fname:            
            self.ui.lineEdit.setText(fname)            
            with open(fname,'r') as f:
            	content = f.read()
            self.ui.plainTextEdit.setPlainText(str(content))            
            


if __name__ == '__main__':
	app = QApplication(sys.argv)
	w = menu()
	w.show()       
	sys.exit(app.exec())