def repaintCells(self):
        from vistrails.packages.spreadsheet.spreadsheet_controller \
             import spreadsheetController
        from vistrails.packages.spreadsheet.spreadsheet_event \
             import RepaintCurrentSheetEvent
        spreadsheetController.postEventToSpreadsheet(RepaintCurrentSheetEvent())
Get the previous valid day.
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/packages/vtk/vtkhandler.py/vtkInteractionHandler.repaintCells--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/views/generic/dates.py/DayMixin.get_previous_day