code: def test_evaluate_triangle(self):
      d3 = pd.Series(rng.normal(loc=2, size=s))
      a = _evaluate(sd1, sd2, num_iters=1000)
      b = _evaluate(sd2, d3, num_iters=1000)
      c = _evaluate(sd1, d3, num_iters=1000)
      assert a + b >= c, f"EMD must satisfy triangle inequality"
  
imports: import numpy
  import pandas
  from aif360.metrics.ot_metric import _normalize, _transform, _evaluate
  from aif360.sklearn.metrics import ot_distance
  from ot import emd2
  import unittest
  from unittest import TestCase
label_desc: Use image node_id 5 for calling the TestEvaluate obj's underlying member method code with example usage: obj.test_evaluate_triangle() without return types