如何更改显示的wx.DirPickerCtrl路径？

Question

我想在运行时更改wxPython DirPickerCtrl的值。在下面的示例中，我尝试使用SetPath（）（代码中的第二行）更改值，但值不会在显示中更改。

有什么想法吗？

#!/usr/bin/env python
# -*- coding: utf-8 -*- 

import wx
import wx.xrc


class MyFrame2 ( wx.Frame ):

    def __init__( self, parent ):
        wx.Frame.__init__ ( self, parent, id = wx.ID_ANY, title = wx.EmptyString, pos = wx.DefaultPosition, size = wx.Size( 500,300 ), style = wx.DEFAULT_FRAME_STYLE|wx.TAB_TRAVERSAL )

        self.SetSizeHintsSz( wx.DefaultSize, wx.DefaultSize )

        bSizer6 = wx.BoxSizer( wx.VERTICAL )

        self.m_dirPicker3 = wx.DirPickerCtrl( self, wx.ID_ANY, wx.EmptyString, u"Select a folder", wx.DefaultPosition, wx.DefaultSize, wx.DIRP_DEFAULT_STYLE )
        bSizer6.Add( self.m_dirPicker3, 0, wx.ALL, 5 )


        self.SetSizer( bSizer6 )
        self.Layout()

        self.Centre( wx.BOTH )

    def __del__( self ):
        pass




class App(wx.App):

    def OnInit(self):
        self.frame = MyFrame2(parent=None)
        self.frame.Show()
        self.SetTopWindow(self.frame)
        return True

if __name__ == '__main__':
    app = App()

    # Trying to change path here
    app.frame.m_dirPicker3.SetPath('/')

    app.MainLoop()