for completeness, adding functions for isoperket and isoperbra
for completeness, adding functions for isoperket and isoperbra

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