PyQt5打开文件对话框QFileDialog

python：3.5
PyQt5
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单个文件打开 QFileDialog.getOpenFileName()
多个文件打开 QFileDialog.getOpenFileNames()
文件夹选取 QFileDialog.getExistingDirectory()
文件保存 QFileDialog.getSaveFileName()

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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_())