code: def test_log_prob_sum(self):
      log_px_torch = dist.Delta(self.v).log_prob(self.test_data).sum()
      assert_equal(log_px_torch.item(), 0)
  
file_path: pyro/tests/distributions/test_delta.py
imports: from unittest import TestCase
  import numpy
  import pytest
  import torch
  import pyro.distributions
  from tests.common import assert_equal
label_desc: Use image node_id 2 for calling the TestDelta obj's underlying member method code with example usage: obj.test_log_prob_sum() without return types