code: def addcols(self, cols, names=None):
          
          data = spreadsheet.addcols(self, cols, names)
          data = data.view(tabarray)
          data.coloring = self.coloring
          return data
docs: Add one or more new columns.
  
          Method wraps::
  
                  tabular.spreadsheet.addcols(self, cols, names)