SwiftNpy

let npy = try Npy(contentsOf: npyUrl)
let shape = npy.shape
let elements: [Float] = npy.elements()
let isFortranOrder = npy.isFortranOrder
try save(npy: npy, to: url)

let npz = try Npz(contentsOf: npzUrl)
let npy = npz["name-of-array"]
try npz.save(to: url)