code: def kl_divergence(u, v):
      """Compute the Kullback-Leibler divergence between two 1-D arrays.
  
      The Kullback-Leibler divergence is defined as
  
      .. math::
          KL(U \\| V) = \\sum_{i} U_i \\log{\\left(\\frac{U_i}{V_i}\\right)}
  
      Args:
          u (array_like): Input array of size (N,)
          v (array_like): Input array of size (N,)
  
      Returns:
          kl_divergence (double): The Kullback-Leibler divergence between
          vectors `u` and `v`.
      """
      if not pylibraft_available:
          raise RuntimeError("pylibraft is not installed")
      u = cupy.asarray(u)
      v = cupy.asarray(v)
      output_arr = cupy.zeros((1,), dtype=u.dtype)
      pairwise_distance(u, v, output_arr, "kl_divergence")
  
      return output_arr[0]
  
imports: import cupy
label_desc: Use image node_id 15 for calling a global function with example usage: kl_divergence(u, v) and returns: output_arr