What is the numpy type corresponding to std::vector<std::size_t> in dolfin?

Question

I have a c++ function that takes

std::vector<std::size_t>

as argument. I tried to pass a numpy array to it unsucessfully. I am getting

TypeError: in method 'MeshDomains_get_indices', argument 2 of type 'std::vector< std::size_t >'

I tried

np.empty(0,dtype=np.intp)
np.empty(0,dtype=np.int32)
np.empty(0,dtype=np.uint)

Answer 1

Try:

np.empty(0,dtype=np.uintp)

and most probably you also need to send in an array with the correct size.