(continued from previous page+++ +++ +++remove one column of data file if you want to remove column you can just calldel sheet column["column "sheet column["column "[ the sheet content will becomesheet pyexcel sheet++column column +==========+========== ++ ++ ++append more columns to data file continue from previous example suppose you want add two more columns to the data file column column here is the example code to append two extra columnsextra_data ["column ""column "][ ][ ][ sheet pyexcel sheet(extra_datasheet sheet column sheet sheet column["column "[ sheet column["column "[ new tutorial