code: def test_dkln1():
      dim = 3
      m1 = np.zeros(dim)
      P1 = np.eye(dim)
      m2 = m1
      P2 = P1
      assert dkl_gaussian(m1, P1, m2, P2) == 0
  
file_path: nipy/nipy/algorithms/clustering/tests/test_bgmm.py
imports: import numpy
  import numpy.random
  from ..bgmm import BGMM, VBGMM, dirichlet_eval, dkl_gaussian, multinomial
label_desc: Use image node_id 3 for calling a global function with example usage: test_dkln1() without return types