code: def testCombinationLast(self):
      g = self.g
      g.es["weight2"] = [1, 0, 2, 6, 8, 4, 7]
      g.simplify(combine_edges="last")
      self.assertTrue(g.es["weight"] == [2, 3, 6])
      self.assertTrue(g.es["weight2"] == [0, 2, 4])
  
imports: import unittest
  from igraph import Graph
label_desc: Use image node_id 10 for calling the AttributeCombinationTests obj's underlying member method code with example usage: obj.testCombinationLast() without return types