code: def __init__(self, data, library_class, *args, **kwargs):
      self._data = data
      self._labels = list(self._data.columns)
      self._adjacency_matrix = None
      self._graph_dot = None
  
label_desc: Use image node_id 1 to create a new GraphLearner object  with example: obj = GraphLearner(data, library_class)