code: def summarize_array_diffs(lhs, rhs):
      """Output value differences, with index for each, between two arrays."""
      result = []
      indices = np.transpose(np.nonzero(lhs - rhs))
      for row in indices:
          index = tuple(np.array([e]) for e in row.tolist())
          lhs_element = lhs[index]
          rhs_element = rhs[index]
          result.append(
              "{}: {} -> {}".format(
                  "".join("[{}]".format(i) for i in row),
                  lhs_element[0],
                  rhs_element[0],
              )
          )
  
      if indices.size:
          return "{} element(s) changed - ".format(
              len(indices)
          ) + "; ".join(result)
      else:
          return ""
  
label_desc: Use image node_id 1 for calling a global function with example usage: summarize_array_diffs(lhs, rhs) and returns: unknown, str