code: def test_namedtuple(self):
      from collections import namedtuple
      from pyspark.cloudpickle import dumps, loads
  
      P = namedtuple("P", "x y")
      p1 = P(1, 3)
      p2 = loads(dumps(p1, 2))
      self.assertEqual(p1, p2)
  
      P2 = loads(dumps(P))
      p3 = P2(1, 3)
      self.assertEqual(p1, p3)
  
imports: import math
  import sys
  import unittest
  from pyspark import serializers
  from pyspark.serializers import CloudPickleSerializer, CompressedSerializer, AutoBatchedSerializer, BatchedSerializer, AutoSerializer, NoOpSerializer, PairDeserializer, FlattenedValuesSerializer, CartesianDeserializer, CPickleSerializer, UTF8Deserializer, MarshalSerializer
  from pyspark.testing.utils import PySparkTestCase, read_int, write_int, ByteArrayOutput, have_numpy, have_scipy
label_desc: Use image node_id 1 for calling the SerializationTestCase obj's underlying member method code with example usage: obj.test_namedtuple() without return types