code: def __init__(self, layer):
      self.in_edges = list()
      self.out_edges = list()
      self.layer = layer
      self.covered = False
      self.real_name = self.name
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
label_desc: Use image node_id 1 to create a new GraphNode object from inherited base classes: object with example: obj = GraphNode(layer)