title: How to set wxpython Grid top headers?
body: <p>When I create a grid with wxpython, I get top column headers as "A", "B", "C"...</p>
  
  <pre><code>import wx
  import wx.grid as gridlib
  
  ########################################################################
  class MyForm(wx.Frame):
      """"""
  
      #----------------------------------------------------------------------
      def __init__(self):
          """Constructor"""
          wx.Frame.__init__(self, parent=None, title="A Simple Grid")
          panel = wx.Panel(self)
  
          myGrid = gridlib.Grid(panel)
          myGrid.CreateGrid(12, 8)
  
          sizer = wx.BoxSizer(wx.VERTICAL)
          sizer.Add(myGrid, 1, wx.EXPAND)
          panel.SetSizer(sizer)
  
  if __name__ == "__main__":
      app = wx.PySimpleApp()
      frame = MyForm().Show()
      app.MainLoop()
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/PFzyH.jpg" alt="enter image description here"></p>
  
  <p>But I'd like to set custom column headers:</p>
  
  <p><img src="https://i.stack.imgur.com/HeRpt.jpg" alt="enter image description here"></p>
  
  <p>How to do this?</p>