fix result_col

@@ -299,6 +299,7 @@ class BSWorkbook(Workbook):
                 add_col = ['金额', '核对结果']
                 amount_cell_idx = len(header)
         header.extend(add_col)
+        result_idx = len(header) - 1
 
         tmp_ws = self.create_sheet('tmp_ws')
         for month in sorted(month_mapping.keys()):
@@ -392,10 +393,10 @@ class BSWorkbook(Workbook):
                     amount_col_letter = get_column_letter(amount_cell_idx + 1)
                     over_col_letter = get_column_letter(over_cell_idx + 1)
                     if is_reverse:
-                        rows[consts.RESULT_IDX].value = '=IF({2}{0}=ROUND(SUM({2}{1},{3}{0}),4), "{4}", "{5}")'.format(
+                        rows[result_idx].value = '=IF({2}{0}=ROUND(SUM({2}{1},{3}{0}),4), "{4}", "{5}")'.format(
                             amount_cell.row - 1, amount_cell.row, over_col_letter, amount_col_letter, *self.proof_res)
                     else:
-                        rows[consts.RESULT_IDX].value = '=IF({2}{0}=ROUND(SUM({2}{1},{3}{0}),4), "{4}", "{5}")'.format(
+                        rows[result_idx].value = '=IF({2}{0}=ROUND(SUM({2}{1},{3}{0}),4), "{4}", "{5}")'.format(
                             amount_cell.row, amount_cell.row - 1, over_col_letter, amount_col_letter, *self.proof_res)
 
             # 3.6.同一天相同进出账高亮