use self.full instead of self.data.todense to avoid np.matrix type
use self.full instead of self.data.todense to avoid np.matrix type

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