module Numo
  class NArray
    def self.zeros: (*untyped) -> untyped
    def dot: (untyped b) -> untyped
    def empty?: () -> bool
    def ndim: () -> Integer
    def shape: () -> Array[Integer]
    def swapaxes: (Integer, Integer) -> untyped
  end

  class DFloat < NArray
    def -@: () -> untyped
    def +: (untyped) -> untyped
    def -: (untyped) -> untyped
    def *: (untyped) -> untyped
    def /: (untyped) -> untyped
    def []: (*untyped) -> untyped
    def []=: (*untyped) -> untyped
  end
end