numpy type aliases have been deprecated, cf....
numpy type aliases have been deprecated, cf. https://numpy.org/doc/stable/release/1.20.0-notes.html#using-the-aliases-of-builtin-types-like-np-int-is-deprecated
numpy type aliases have been deprecated, cf. https://numpy.org/doc/stable/release/1.20.0-notes.html#using-the-aliases-of-builtin-types-like-np-int-is-deprecated