Fix deprecated/removed numpy attribute asscalar.

[bnubald]

On newer versions of numpy, the attribute asscalar has been deprecated (in version 1.16) and removed as of version 1.23.

Older versions will trigger the following error:

AttributeError: module 'numpy' has no attribute 'asscalar'

Solution should be to switch to numpy.ndarray.item() instead.

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Lines to fix:

equadratures/equadratures/optimisation.py

Line 62 in c6faba2

objective = lambda x: k*np.asscalar(f(x))

equadratures/equadratures/optimisation.py

Line 250 in c6faba2

constraint = lambda x: np.asscalar(g(x))

equadratures/equadratures/optimisation.py

Line 344 in c6faba2

self.f_old = np.asscalar(self.f[ind_min])

equadratures/equadratures/optimisation.py

Line 409 in c6faba2

return np.asscalar(f)

equadratures/equadratures/optimisation.py

Line 845 in c6faba2

res = optimize.minimize(lambda x: np.asscalar(my_poly.get_polyfit(x)), self.s_old, method='TNC', \

equadratures/equadratures/optimisation.py

Line 848 in c6faba2

res = optimize.minimize(lambda x: np.asscalar(my_poly.get_polyfit(np.dot(x,self.U))), self.s_old, \

equadratures/equadratures/optimisation.py

Line 935 in c6faba2

del_m = np.asscalar(my_poly.get_polyfit(self.s_old)) - m_new

equadratures/equadratures/optimisation.py

Line 997 in c6faba2

del_m = np.asscalar(my_poly.get_polyfit(np.dot(self.s_old,self.U))) - m_new

equadratures/equadratures/sampling_methods/induced.py

Line 402 in c6faba2

F = np.asscalar(F)

equadratures/equadratures/solver.py

Line 493 in c6faba2

fe = 0.5*(np.asscalar(np.dot(r.T,r)) - epsilon**2)

equadratures/equadratures/solver.py

Line 534 in c6faba2

cqe = np.asscalar(np.dot(r.T,r)) - epsilon**2

equadratures/equadratures/subspaces.py

Line 665 in c6faba2

dV[:,l,:,j] = np.asscalar(vectord[l])*(X.T*current[:,j])