An error of example/pinn_forward/Helmholtz_Dirichlet_2d_HPO.py

[lijialin03]

Discussed in #1445

^{Originally posted by lijialin03 August 18, 2023}
Function 'gp_minimize' of package 'skopt (scikit-optimize)' is used in this example and an error has been reported like,

The reason is that 'np.int' used in skopt was deprecated in NumPy 1.20. The newest NumPy is version 1.25.
My skopt version is 0.9.0. I think it is the latest version in https://pypi.org/search/?q=scikit-optimize. So this example may require NumPy 1.20 or lower while there is no version requirements of NumPy in requirements.txt.

[lululxvi]

How about fixing this using the solutions at scikit-optimize/scikit-optimize#1138

[lijialin03]

How about fixing this using the solutions at scikit-optimize/scikit-optimize#1138

Yes, the solution do works. I submit a PR here #1450 to apply it.