code: def test_dict_for(self):
      return self.run_test(
          "def dict_for(a): return sorted([x for x in a])",
          {"a": 1, "e": 2},
          dict_for=[Dict[str, int]],
      )
  
imports: from pythran.tests import TestEnv
  from pythran.typing import Dict, List
label_desc: Use image node_id 21 for calling the TestDict obj's underlying member method code with example usage: obj.test_dict_for() and returns: self