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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def OnCellTextRotation(self, event):
 """Cell text rotation event handler"""


        with undo.group(_("Rotation")):
            self.grid.actions.toggle_attr("angle")

        self.grid.ForceRefresh()

        self.grid.update_attribute_toolbar()

        if is_gtk():
            try:
                wx.Yield()
            except:
                pass

        event.Skip()