code: def test_gradients(self):
      for N in [3, 5]:
          for reparameterized in [True, False]:
              self.do_test_gradients(N, reparameterized)
  
file_path: pyro/tests/infer/test_conjugate_gradients.py
imports: import pyro
  from pyro.infer.tracegraph_elbo import TraceGraph_ELBO
  from tests.common import assert_equal
  from tests.integration_tests.test_conjugate_gaussian_models import GaussianChain
label_desc: Use image node_id 1 for calling the ConjugateChainGradientTests obj's underlying member method code with example usage: obj.test_gradients() without return types