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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 update_cursor(self, dc, grid, row, col):
 """Whites out the old cursor and draws the new one"""


        old_row, old_col = self.old_cursor_row_col

        bgcolor = get_color(config["background_color"])

        self._draw_cursor(dc, grid, old_row, old_col,
                          pen=wx.Pen(bgcolor), brush=wx.Brush(bgcolor))
        self._draw_cursor(dc, grid, row, col)