code: def test_new_symbol_avoids_duplicates(self):
      namer = naming.Namer({})
      self.assertEqual("temp", namer.new_symbol("temp", set()))
      self.assertEqual("temp_1", namer.new_symbol("temp", set()))
      self.assertEqual(
          ("temp", "temp_1"), tuple(sorted(namer.generated_names))
      )
  
imports: import unittest
  from nvidia.dali._autograph.pyct import naming
label_desc: Use image node_id 2 for calling the NamerTest obj's underlying member method code with example usage: obj.test_new_symbol_avoids_duplicates() without return types