[Question] How to convert into qulacs Hamiltonian in VQE

[arijit-ship]

I am learning qulacs and I am following the VQE tutorial on the official docs(http://docs.qulacs.org/en/latest/apply/6.2_vqe.html)

But I want my Hamiltonian to be Ising spin chain which I have constructed following another tutorial of their documentation (http://docs.qulacs.org/en/latest/apply/5.2_qcl.html#1.Create-a-transverse-magnetic-field-Ising-Hamiltonian)

Now I need to convert the Ising Hamiltonian into qulacs Hamiltonian so that I can use qulacs_hamiltonian.get_expectation_value(state) . In the VQE tutorial qulacs_hamiltonian = create_observable_from_openfermion_text(str(jw_hamiltonian)) . But I am not using openfermion to create the Ising Hamiltonian (I don not know how do so either) I am not sure how to convert it to qulacs Hamiltonian.

Now how do I convert the Ising Hamiltonian into qulacs hamiltonian (Observable)? (edited)