Visualisation does not wot work because np.mat is removed

[weidtn]

Whenever I try to run an example that uses the visualisation I get errors, because numpy's mat was removed in numpy 2.0:

AttributeError: `np.mat` was removed in the NumPy 2.0 release. Use `np.asmatrix` instead.. Did you mean: '_mat'?                                                                                                                    

[jngrad]

This was already fixed by #4971.

Also, please keep in mind we don't officially support NumPy 2.0 yet:

espresso/requirements.txt

Line 6 in 8c90c3d

numpy>=1.26.4,<2.0

[weidtn]

Oh okay sorry, did not see that when I was searching github. Maybe because it was not an issue.