pyexcel sheet named_columns( ~pyexcel sheet save_to_memory and ~pyexcel book save_to_memory return the actual content no longer they will return io object hence you cannot call getvalue(on them removed content and out_file as function parameters to the signature functions are no longer supported sourcefactory and rendererfactory are removed the following methods are removed pyexcel to_array pyexcel to_dict pyexcel utils to_one_dimensional_array pyexcel dict_to_array pyexcel from_records pyexcel to_records pyexcel sheet filter has been re-implemented and all filters were removedpyexcel filters columnindexfilter pyexcel filters columnfilter pyexcel filters rowfilter pyexcel filters evencolumnfilter pyexcel filters oddcolumnfilter pyexcel filters evenrowfilter pyexcel filters oddrowfilter pyexcel filters rowindexfilter pyexcel filters singlecolumnfilter pyexcel filters rowvaluefilter pyexcel filters namedrowvaluefilter pyexcel filters columnvaluefilter pyexcel filters namedcolumnvaluefilter pyexcel filters singlerowfilter the following functions have been removed add_formatter remove_formatter clear_formatters freeze_formatters add_filter remove_filter clear_filters support the project