class_docstr: !
  @brief Object description that used by OPTICS algorithm for cluster analysis.
docstr: !
  @brief Returns string representation of the optics descriptor.
code: def __repr__(self):
      """!
      @brief Returns string representation of the optics descriptor.
  
      """
  
      return "(%s, [c: %s, r: %s])" % (
          self.index_object,
          self.core_distance,
          self.reachability_distance,
      )
  
imports: import math
  import matplotlib.pyplot
  from pyclustering.container.kdtree import kdtree_balanced
  from pyclustering.cluster.encoder import type_encoding
  from pyclustering.utils.color import color
  from pyclustering.core.wrapper import ccore_library
  import pyclustering.core.optics_wrapper
label_desc: Use image node_id 2 for calling the optics_descriptor obj's underlying member method code with example usage: obj.__repr__() and returns: unknown