code: def test_compute_budgets_none_noise(self):
      accountant = PLDBudgetAccountant(
          total_epsilon=3, total_delta=1e-5
      )
      accountant.compute_budgets()
      self.assertEqual(None, accountant.minimum_noise_std)
  
imports: import sys
  import unittest
  from dataclasses import dataclass
  from pipeline_dp.budget_accounting import MechanismSpec
  from pipeline_dp.aggregate_params import MechanismType
  from pipeline_dp.budget_accounting import NaiveBudgetAccountant
  from pipeline_dp.budget_accounting import PLDBudgetAccountant
  from absl.testing import parameterized
label_desc: Use image node_id 5 for calling the PLDBudgetAccountantTest obj's underlying member method code with example usage: obj.test_compute_budgets_none_noise() without return types