code: def to_dict(self, tuples):
      di = {}
      for a, b in tuples:
          di.setdefault(a, b)
      return di
  
imports: import pyspark
  from pyspark import SparkContext
  from absl.testing import parameterized
  from unittest.mock import patch
  import unittest
  import sys
  import collections
  import pipeline_dp
  from pipeline_dp import aggregate_params
  from pipeline_dp import budget_accounting, private_spark
label_desc: Use image node_id 3 for calling the PrivateRDDTest obj's underlying member method code with example usage: obj.to_dict(tuples) and returns: di