code: def deletecols(self, cols):
          
          if isinstance(cols, str):
          	cols = cols.split(',')
          deletenames = utils.uniqify(utils.listunion([[c] if c in 
          self.dtype.names else self.coloring[c] for c in cols]))
          return spreadsheet.deletecols(self,deletenames)
docs: Delete columns and/or colors.
  
          Method wraps::
  
                  tabular.spreadsheet.deletecols(self, cols)