text: import unittest
  
  class TestB4TF(unittest.TestCase):
      def test_import_b4tf(self):
          import b4tf as _b4tf
          pbp = _b4tf.models.PBP([2,1])
          mcbn = _b4tf.models.MCBN([2,1],0.5)
  
      def test_import_PBP(self):
          from b4tf.models import PBP as _PBP, MCBN as _MCBN
          pbp = _PBP([2,1])
          mcbn = _MCBN([2,1],0.5)
  
      def test_import_models(self):
          import b4tf.models as _models
          pbp = _models.PBP([2,1])
          mcbn = _models.MCBN([2,1],0.5)
  
  if __name__ == "__main__":
      unittest.main()
  