code: def setUp(self):
      el = [(0, 1), (1, 0), (1, 2), (2, 3), (2, 3), (2, 3), (3, 3)]
      self.g = Graph(el)
      self.g.es["weight"] = [1, 2, 3, 4, 5, 6, 7]
      self.g.es["weight2"] = [1, 2, 3, 4, 5, 6, 7]
  
imports: import unittest
  from igraph import Graph
label_desc: Use image node_id 1 for calling the AttributeCombinationTests obj's underlying member method code with example usage: obj.setUp() without return types