如何在ColumnDataSource对象上保留选定的点并使用ResetTool取消选择它们？

I have plotted a circle glyph. When I select some points they are marked as selected. But I lose the selection when I change the tool I am using or when I click on some other place of the figure. Which is the best way to keep the selection on the circle glyph?. I want to deselect all the points when the I have plotted a circle glyph. When I select so