code: def test_forward_probability2():
      from numpy.testing import assert_array_almost_equal
  
      model, states, symbols, seq = _wikipedia_example_hmm()
      fp = 2 ** model._forward_probability(seq)
  
      # examples in wikipedia are normalized
      fp = (fp.T / fp.sum(axis=1)).T
  
      wikipedia_results = [
          [0.8182, 0.1818],
          [0.8834, 0.1166],
          [0.1907, 0.8093],
          [0.7308, 0.2692],
          [0.8673, 0.1327],
      ]
  
      assert_array_almost_equal(wikipedia_results, fp, 4)
  
imports: import pytest
  from nltk.tag import hmm
label_desc: Use image node_id 3 for calling a global function with example usage: test_forward_probability2() without return types