OSIS-4745 Correct __init__ for backward compatibility
OSIS-4745 Correct __init__ for backward compatibility

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