code: def test_dict_update(self):
      return self.run_test(
          "def dict_update(a):\n a.update([(1,'e')])\n a.update({2:'c'})\n return a",
          {1: "a", 2: "b"},
          dict_update=[Dict[int, str]],
      )
  
imports: from pythran.tests import TestEnv
  from pythran.typing import Dict, List
label_desc: Use image node_id 28 for calling the TestDict obj's underlying member method code with example usage: obj.test_dict_update() and returns: self