PyQt5打开文件对话框QFileDialog实例代码

from PyQt5 import QtWidgetsfrom PyQt5.QtWidgets import QFileDialogclass MyWindow(QtWidgets.QWidget):  def __init__(self):    super(MyWindow,self).__init__()    self.myButton = QtWidgets.QPushButton(self)    self.myButton.setObjectName("myButton")    self.myButton.setText("Test")    self.myButton.clicked.connect(self.msg)  def msg(self):    directory1 = QFileDialog.getExistingDirectory(self,                  "选取文件夹",                  "./")                 #起始路径    print(directory1)    fileName1, filetype = QFileDialog.getOpenFileName(self,                  "选取文件",                  "./",                  "All Files (*);;Text Files (*.txt)")  #设置文件扩展名过滤,注意用双分号间隔    print(fileName1,filetype)    files, ok1 = QFileDialog.getOpenFileNames(self,                  "多文件选择",                  "./",                  "All Files (*);;Text Files (*.txt)")    print(files,ok1)    fileName2, ok2 = QFileDialog.getSaveFileName(self,                  "文件保存",                  "./",                  "All Files (*);;Text Files (*.txt)")if __name__=="__main__":   import sys   app=QtWidgets.QApplication(sys.argv)   myshow=MyWindow()  myshow.show()  sys.exit(app.exec_())