def   define_zip_index_for_species(names_ppn_world,<EOL>number_names_ppn_world):
<EOL>global cl<EOL>cl={}<EOL>for a,b in zip(names_ppn_world,number_names_ppn_world):<EOL><INDENT>cl[a] = b<EOL><DEDENT>
This just give back cl, that is the original index as it is read from files from a data file.