attempt to fix issue #75: allow iterables by casting to list once
attempt to fix issue #75: allow iterables by casting to list once

qutip/qutip,zasdfgbnm/qutip,zasdfgbnm/qutip,cgranade/qutip,qutip/qutip,anubhavvardhan/qutip,anubhavvardhan/qutip,cgranade/qutip