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