Select Deselect all values using python script in Spotfire

from Spotfire.Dxp.Application.Filters import CheckBoxHierarchyFilter plFilter=Document.FilteringSchemes[1].Item[tab].Item[tab.Columns.Item["Region"]].As[CheckBoxHierarchyFilter]() if Document.Properties.Item["Status"]=="All": plFilter.UncheckAllNodes() Document.Properties.Item["Status"]="None" else: plFilter.CheckAllNodes() Document.Properties.Item["Status"]="All"