> '$output' && ## verify that ext is "data" for absent optional input echo INPUT ext $names.ext >> '$output' && ## verify that is_of_type for absent optional input ## does not evaluate to True for any of the allowed datatypes echo ISOFTYPE mothur.names $names.is_of_type("mothur.names") >> '$output' && echo ISOFTYPE mothur.count_table $names.is_of_type("mothur.count_table") >> '$output' ]]>