code: def _col_widths2xls(self, worksheets):
          
  
          xls_max_cols, xls_max_tabs = self.xls_max_cols, self.xls_max_tabs
  
          dict_grid = self.code_array.dict_grid
  
          for col, tab in dict_grid.col_widths:
              if col < xls_max_cols and tab < xls_max_tabs:
                  pys_width = dict_grid.col_widths[(col, tab)]
                  xls_width = self.pys_width2xls_width(pys_width)
                  worksheets[tab].col(col).width = xls_width
docs: Writes col_widths to xls file
  
          Format: <col>\t<tab>\t<value>\n