Python-сообщество

 import sys
from PyQt5.QtWidgets import (QApplication, QMainWindow, QWidget, QPushButton, QAction, QTextEdit, QFileDialog)
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import pyqtSlot
 
class App(QMainWindow):
 
    def __init__(self):
        super().__init__()        
        self.title = 'SimpleEditor'
        self.left = 10
        self.top = 10
        self.width = 800
        self.height = 600
        self.initUI()
 
    def initUI(self):
        self.textEdit = QTextEdit()
        self.setCentralWidget(self.textEdit)
        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)
        self.statusBar().showMessage('This is statusbar')
        
        #Тулбар
        mainMenu = self.menuBar() 
        fileMenu = mainMenu.addMenu('File')
        editMenu = mainMenu.addMenu('Edit')
        viewMenu = mainMenu.addMenu('View')
        searchMenu = mainMenu.addMenu('Search')
        toolsMenu = mainMenu.addMenu('Tools')
        helpMenu = mainMenu.addMenu('Help')
        
        #Новый файл
        newAction = QAction('New', self)
        newAction.setShortcut('Ctrl+N')
        newAction.setStatusTip('Create a file')
        newAction.triggered.connect(self.newFile)
        
        #открыть файл
        openAction = QAction(QIcon('open.png'), 'Open', self)
        openAction.setShortcut('Ctrl+O')
        openAction.setStatusTip('Open new File')
        openAction.triggered.connect(self.openFile)
        
        #Сохранить файл
        saveAction = QAction(QIcon('save.png'), 'Save As', self)
        saveAction.setShortcut('Ctrl+s')
        saveAction.setStatusTip('Save as file')
        saveAction.triggered.connect(self.saveAs)
        
        #Выход
        exitAction = QAction('Exit', self)
        exitAction.setShortcut('Ctrl+Q')
        exitAction.setStatusTip('Exit application')
        exitAction.triggered.connect(self.close)
        
        fileMenu.addAction(newAction)
        fileMenu.addAction(openAction)
        fileMenu.addAction(saveAction)
        fileMenu.addAction(exitAction)
        
        
        self.show()
    
    def newFile(self):
        self.textEdit.setText("")
   
    def saveAs(self):
        filename = QFileDialog.getSaveFileName(self)
        f = open(filename, 'w')
        txt = self.textEdit.toPlainText()
        f.write("txt")
        f.close()
        
    def openFile(self):
        fname = QFileDialog.getOpenFileName(self, 'Open File', '/home', "All Files (*);;Python Files (*.py)")[0]
        f = open(fname, 'r')
        with f:
            data = f.read()
            self.textEdit.setText(data)
            
        
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

 QFileDialog.getOpenFileName(self, 'Open File', '/home', "All Files (*);;Python Files (*.py)")

  QFileDialog.getOpenFileName(self, 'Open File', '/home')