old_contents: """
  Python Bayesian hierarchical clustering (PyBHC).
  Heller, K. A., & Ghahramani, Z. (2005). Bayesian Hierarchical 
      Clustering. Neuroscience, 6(section 2), 297-304. 
      doi:10.1145/1102351.1102389
  """
  
  from bhc import bhc
  from dists import NormalInverseWishart
  
new_contents: """
  Python Bayesian hierarchical clustering (PyBHC).
  Heller, K. A., & Ghahramani, Z. (2005). Bayesian Hierarchical 
      Clustering. Neuroscience, 6(section 2), 297-304. 
      doi:10.1145/1102351.1102389
  """
  
  from bhc import bhc
  from dists import NormalInverseWishart, NormalFixedCovar
  from rbhc import rbhc
  
subject: Update importing of prob dists