old_contents: from .base import Inference
  from .ExactInference import VariableElimination
  from .ExactInference import BeliefPropagation
  from .Sampling import BayesianModelSampling
  from .mplp import Mplp
  
  __all__ = ['Inference',
             'VariableElimination',
             'BeliefPropagation',
             'BayesianModelSampling',
             'Mplp']
  
new_contents: from .base import Inference
  from .ExactInference import VariableElimination
  from .ExactInference import BeliefPropagation
  from .Sampling import BayesianModelSampling
  from .dbn_inference import DBNInference
  
  __all__ = ['Inference',
             'VariableElimination',
             'DBNInference',
             'BeliefPropagation',
             'BayesianModelSampling']
  
subject: Update __init__.py