fixed PEP8 issue
fixed PEP8 issue

uclouvain/osis,uclouvain/osis_louvain,uclouvain/osis,uclouvain/osis_louvain,uclouvain/osis,uclouvain/osis_louvain,uclouvain/OSIS-Louvain,uclouvain/OSIS-Louvain,uclouvain/osis,uclouvain/OSIS-Louvain