Set grid cell background transparency

How can I set the background transparency of a grid cell. Or is it 
impossible?

import wx
import wx.grid


class Frame(wx.Frame):

    def __init__(self, parent):
        super().__init__(parent)

        grid = wx.grid.Grid(self)
        grid.CreateGrid(3, 3)

        grid.SetCellBackgroundColour(0, 0, wx.Colour(255, 0, 0, 0))
        grid.SetCellBackgroundColour(1, 0, wx.Colour(255, 0, 0, 127))
        grid.SetCellBackgroundColour(2, 0, wx.Colour(255, 0, 0, 255))


if __name__ == '__main__':
    app = wx.App()
    frame = Frame(None)
    frame.Show()
    app.MainLoop()

[image: Снимок.PNG] <about:invalid#zClosurez>







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