old_contents: """fglib -- Factor Graph Library.
  
  Python package for factor graphs built upon NetworkX.
  
  Modules:
      inference: Module for inference algorithms.
      graphs: Module for factor graphs.
      nodes: Module for nodes of factor graphs.
      edges: Module for edges of factor graphs.
      rv: Module for random variables.
      utils: Module for utilities.
  
  """
  
  __all__ = ["graphs", "inference", "nodes", "rv", "utils"]
  __version__ = "0.2.0"
  
new_contents: """fglib -- Factor Graph Library.
  
  Python package for factor graphs built upon NetworkX.
  
  Modules:
      inference: Module for inference algorithms.
      graphs: Module for factor graphs.
      nodes: Module for nodes of factor graphs.
      edges: Module for edges of factor graphs.
      rv: Module for random variables.
      utils: Module for utilities.
  
  """
  
  __all__ = ["graphs", "inference", "nodes", "rv", "utils"]
  __version__ = "0.2.1"
  
subject: adjust version number