How to refresh the main frame when the child dialog do someting - python-3.x

Question

I want the main frame refresh to update the label When I click the "done" button on MyDialog, But now it doesn't work.
Does there anything wrong? Thanks.
This is the code:
MyDialog: the child dialog where there is a button on it to update the label of the main frame
MainFrame: the main Frame, there is a button on it to start my dialog
# -*- coding: utf-8 -*-
import wx
#Dialog
class MyDialog(wx.Dialog):
"""setting MyDialog."""
def __init__(self):
self.dlg_main = wx.Dialog.__init__(self, None, -1, title="setting", size=(300, 300))
self.btn_ok = wx.Button(self, label="done", pos=(30, 30), size=(50, 26))
self.Bind(wx.EVT_BUTTON, self.__OnButtonClick_save, self.btn_ok,)
def __OnButtonClick_save(self, event):
self.Destroy()
main = MainFrame()
**main.set_label_name('test')**
main.Destroy()
def start_dialog():
my_dialog = MyDialog()
my_dialog.ShowModal()
my_dialog.Destroy()
#Main Frame
class MainFrame(wx.Frame):
def __init__(self):
self.main_frame = wx.Frame.__init__(self, None, -1, title='simple', size=(400, 400))
self.Centre()
self.label_name = wx.StaticText(self, label="Hello，everyone", pos=(30, 30))
self.btn_set = wx.Button(self, label="set", pos=(30, 60))
self.Bind(wx.EVT_BUTTON, self.on_button_click, self.btn_set)
def set_label_name(self, str):
print(str)
self.label_name.SetLabel('hello, Boys')
def on_button_click(self, event):
start_dialog()
def show_main():
main = wx.App()
main_win = MainFrame()
main_win.Show()
main.MainLoop()
if __name__ == '__main__':
show_main()

Answer 1

I have got the method, thanks all!
The point is how to call the parent method, so , use self.parent.xxx to fix the problem.
The code like this:
# -*- coding: utf-8 -*-
import wx
#Dialog
class MyDialog(wx.Dialog):
"""setting MyDialog."""
def __init__(self, parent, title):
super(MyDialog, self).__init__(parent, title=title, size=(300, 300))
self.parent = parent
panel = wx.Panel(self)
btn_ok = wx.Button(panel, label="done", pos=(30, 30), size=(50, 26))
btn_ok.Bind(wx.EVT_BUTTON, self.__OnButtonClick_save)
def __OnButtonClick_save(self, event):
#THis is the different
self.parent.set_label_name('test')
self.Destroy()
def start_dialog():
my_dialog = MyDialog()
my_dialog.ShowModal()
my_dialog.Destroy()
#Main Frame
class MainFrame(wx.Frame):
def __init__(self):
self.main_frame = wx.Frame.__init__(self, None, -1, title='simple', size=(400, 400))
self.init_ui()
def init_ui(self):
self.label_name = wx.StaticText(self, label="Hello，everyone", pos=(30, 30))
btn_set = wx.Button(self, label="set", pos=(30, 60))
btn_set.Bind(wx.EVT_BUTTON, self.on_button_click)
self.Centre()
def set_label_name(self, str):
self.label_name.SetLabel('hello, Boys')
def on_button_click(self, event):
my_dialog = MyDialog(self, "setting")
my_dialog.ShowModal()
my_dialog.Destroy()
def show_main():
main = wx.App()
main_win = MainFrame()
main_win.Show()
main.MainLoop()
if __name__ == '__main__':
show_main()
Thanks for the idea in this answer Wxpython show dialog on main frame startup