code: def simple_name_generator(obj):
      
  
      if isinstance(obj, LabelledData):
          labels = obj.traverse(lambda x:
                                (x.group + ('-'  +x.label if x.label else '')))
          labels=[l[0] for l in itertools.groupby(labels)]
          obj_str = ','.join(labels)
      else:
          obj_str = repr(obj)
      return obj_str
docs: Simple name_generator designed for HoloViews objects.
  
      Objects are labeled with {group}-{label} for each nested
      object, based on a depth-first search.  Adjacent objects with
      identical representations yield only a single copy of the
      representation, to avoid long names for the common case of
      a container whose element(s) share the same group and label.