[Kwant] Plotting Particle-Hole density in KWANT

Hi KWANT users! I was trying to plot particle-hole density in KWANT. My system has spin, pseudospin and particle-hole so, norbs = 8. I used kwant.operator.Density(np.kron(np.eye(4), \tau_z)) to plot particle-hole density but could not obtain correct result. It would be great if someone could tell how to plot particle hole density in this case ? Thanks in advance.