标准文件打开保存框 QFileDialog

1、代码

from PyQt5 import QtWidgets  
from PyQt5.QtWidgets import QFileDialog  

class 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",  
                                    "C:/")                                 #起始路径  
        print(directory1)  

        fileName1, filetype = QFileDialog.getOpenFileName(self,  
                                    "选取文件",  
                                    "C:/",  
                                    "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",  
                                    "C:/",  
                                    "All Files (*);;Text Files (*.txt)")  
        print(files,ok1)  

        fileName2, ok2 = QFileDialog.getSaveFileName(self,  
                                    "文件保存",  
                                    "C:/",  
                                    "All Files (*);;Text Files (*.txt)")  

if __name__=="__main__":    
    import sys    

    app=QtWidgets.QApplication(sys.argv)    
    myshow=MyWindow()  
    myshow.show()  
    sys.exit(app.exec_())