code: def test_init_local_kg(self):
      kg = KG("samples/mutag/mutag.owl")
      assert len(kg._transition_matrix) > 0
      assert len(kg._inv_transition_matrix) > 0
  
imports: import numpy
  import pytest
  from pyrdf2vec.graphs import KG, Vertex
label_desc: Use image node_id 8 for calling the TestKG obj's underlying member method code with example usage: obj.test_init_local_kg() without return types