code: def derivativeW(self,*args):
          '''
          Returns the derivative of the function with respect to the W dimension.
          This should only exist when n_dims >= 4.
          '''
          if self.n_dims >= 4:
              j = 0
          else:
              assert False, "Derivative with respect to W can't be called when n_dims < 4!"
          if self.i_dim == j:
              return np.ones_like(*args[0])
          else:
              return np.zeros_like(*args[0]f derivativeW(self,*args):
          '''
          Returns the derivative of the function with respect to the W dimension.
          This should only exist when n_dims >= 4.
          '''
          if self.n_dims >= 4:
              j = 0
          else:
              assert False, "Derivative with respect to W can't be called when n_dims < 4!"
          if self.i_dim == j:
              return np.ones_like(*args[0])
          else:
              return np.zeros_like(*args[0])
docs: Returns the derivative of the function with respect to the W dimension.
          This should only exist when n_dims >= 4.