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Play wav sound

import wx from wx.lib.filebrowsebutton import FileBrowseButton class MyFrame(wx.Frame):     def __init__(self):         wx.Frame.__init__(self, None, title="wx.Sound",size=(500,100))         p = wx.Panel(self)         self.fbb = FileBrowseButton(p,labelText="Select WAV file:",fileMask="*.wav")         btn = wx.Button(p, -1, "Play")         self.Bind(wx.EVT_BUTTON, self.OnPlaySound, btn)                  sizer = wx.BoxSizer(wx.HORIZONTAL)         sizer.Add(self.fbb, 1, wx.ALIGN_CENTER_VERTICAL)         sizer.Add(btn, 0, wx.ALIGN_CENTER_VERTICAL)         border = wx.BoxSizer(wx.VERTICAL)         border.Add(sizer, 0, wx.EXPAND|wx.ALL, 15)         p.SetSizer(border)     def OnPlaySound(self, evt):         filename = self.fbb.GetValue()         self.sound = wx.Sound(filename)         if self.sound.IsOk():             self.sound.Play(wx.SOUND_ASYNC)         else:             wx.MessageBox("Invalid sound file", "Error")      app = wx.PySimpleApp() frm = MyFrame() frm.Show() app.MainLoop()