code: def _do_layout(self):
          
  
          sizer_v = wx.BoxSizer(wx.VERTICAL)
          sizer_h = wx.BoxSizer(wx.HORIZONTAL)
  
          style = wx.ALL | wx.ALIGN_CENTER_HORIZONTAL | wx.ALIGN_CENTER_VERTICAL
          sizer_h.Add(self.logo_pyspread, 0, style, 10)
          sizer_h.Add(self.about_label, 0, style, 10)
          sizer_v.Add(sizer_h)
          self.SetSizer(sizer_v)
          sizer_v.Add(self.button_close, 0, style, 10)
          sizer_v.Fit(self)
          self.Layout()
          self.Centre()
docs: Layout sizers