def test_equals_2(self):
     self.assertEqual(list_de_dup([1, 2, 3, 4, 1, 2, 3, 4]), [1, 2, 3, 4])
 def test_equals(self):
     self.assertEqual(list_de_dup(['g', 3, 'a', 'a']), [3, 'a', 'g'])
 def test_equals_3(self):
     self.assertEqual(list_de_dup([
         'code', 'wars', 'ain\'t', None, None, 'code', 'wars', 'ain\'t',
         'the', 'same', 'as', 'the', 'rest']),
         ['ain\'t', 'as', 'code', 'rest', 'same', 'the', 'wars'])
 def test_equals_2(self):
     self.assertEqual(list_de_dup([1, 2, 3, 4, 1, 2, 3, 4]), [1, 2, 3, 4])
 def test_equals(self):
     self.assertEqual(list_de_dup(['g', 3, 'a', 'a']), [3, 'a', 'g'])
 def test_equals_3(self):
     self.assertEqual(
         list_de_dup([
             'code', 'wars', 'ain\'t', None, None, 'code', 'wars', 'ain\'t',
             'the', 'same', 'as', 'the', 'rest'
         ]), ['ain\'t', 'as', 'code', 'rest', 'same', 'the', 'wars'])