UPDATED: ptrace now used sp_reshape instead of older code
UPDATED: ptrace now used sp_reshape instead of older code

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