code: def test_normal(self):
      assert _kl.kl_normal_distribution(0, 1, 0, 1) == 0
      assert _kl.kl_normal_distribution(0, 1, 1, 1) > 0
  
file_path: hmmlearn/lib/hmmlearn/tests/test_kl_divergence.py
imports: import numpy
  from hmmlearn import _kl_divergence
label_desc: Use image node_id 2 for calling the TestKLDivergence obj's underlying member method code with example usage: obj.test_normal() without return types