# Plotting Bloch sphere in QuTiP

Is there anyone who reproduced the Bloch sphere given in the paper QuTiP: An open-source Python framework for the dynamics of open quantum systems by J. R. Johansson, P. D. Nation, Franco Nori? I am trying to reproduce the Figure 10: Bloch sphere representation of the Landau-Zener transition. The code they used is given in the appendix of the paper.

But when I am trying to plot this, I am getting an error:

AttributeError: 'numpy.ndarray' object has no attribute 'indices'