PyQt5--QFileDiaglog

 # -*- coding:utf-8 -*-
 '''
 Created on Sep 17, 2018

 @author: SaShuangYiBing

 Comment:
 '''
 import sys
 from PyQt5.QtGui import QIcon
 from PyQt5.QtWidgets import QApplication,QMainWindow,QFileDialog,QTextEdit,QAction

 class New_test(QMainWindow):
     def __init__(self):
         super().__init__()
         self.initUI()

     def initUI(self):
         self.textEdit = QTextEdit()
         self.setCentralWidget(self.textEdit)
         self.statusBar()

         openFile = QAction(QIcon('exit.png'),'Open',self)
         openFile.setShortcut('Crtl+O')
         openFile.setStatusTip('Open new file')
         openFile.triggered.connect(self.showdiaglog)

         menubar = self.menuBar()
         fileMenu = menubar.addMenu('&File')
         fileMenu.addAction(openFile)

         self.setGeometry(300,300,350,300)
         self.setWindowTitle('File Diaglog')
         self.show()

     def showdiaglog(self):
         try:
             fname = QFileDialog.getOpenFileName(self,'Open file','/home')

             if fname[0]:
                 with open(fname[0],'r',encoding='utf-8') as f:   # 在Python3中使用open时后面需要带上编码方式，否则易引起打开非utf-8编码字符时会报错
                     data = f.read()
                     self.textEdit.setText(data)
         except Exception as e:
             print (e)

 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = New_test()
     sys.exit(app.exec_())