code: def test_next_normal(self):
      iterator = iter([1, 2, 3])
      self.assertEqual(py_builtins.next_(iterator), 1)
      self.assertEqual(py_builtins.next_(iterator), 2)
      self.assertEqual(py_builtins.next_(iterator), 3)
      with self.assertRaises(StopIteration):
          py_builtins.next_(iterator)
      self.assertEqual(py_builtins.next_(iterator, 4), 4)
  
imports: import unittest
  from nvidia.dali._autograph.core import converter
  from nvidia.dali._autograph.core import function_wrappers
  from nvidia.dali._autograph.operators import py_builtins
label_desc: Use image node_id 13 for calling the PyBuiltinsTest obj's underlying member method code with example usage: obj.test_next_normal() without return types