code: def setup_method(self):
      self.G = nx.Graph(
          {0: [1, 2, 3], 1: [1, 2, 0], 4: []}, name="Test"
      )
      self.Gdegree = {0: 3, 1: 2, 2: 2, 3: 1, 4: 0}
      self.Gnodes = list(range(5))
      self.Gedges = [(0, 1), (0, 2), (0, 3), (1, 0), (1, 1), (1, 2)]
      self.DG = nx.DiGraph({0: [1, 2, 3], 1: [1, 2, 0], 4: []})
      self.DGin_degree = {0: 1, 1: 2, 2: 2, 3: 1, 4: 0}
      self.DGout_degree = {0: 3, 1: 3, 2: 0, 3: 0, 4: 0}
      self.DGnodes = list(range(5))
      self.DGedges = [(0, 1), (0, 2), (0, 3), (1, 0), (1, 1), (1, 2)]
  
imports: import random
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 1 for calling the TestFunction obj's underlying member method code with example usage: obj.setup_method() without return types