code: def ReadPreprocessingInformation(self, knowledge_base):
      
      if not self._storage_file:
        raise IOError('Unable to read from closed storage writer.')
  
      self._storage_file.ReadPreprocessingInformation(knowledge_base)
docs: Reads preprocessing information.
  
      The preprocessing information contains the system configuration which
      contains information about various system specific configuration data,
      for example the user accounts.
  
      Args:
        knowledge_base (KnowledgeBase): is used to store the preprocessing
            information.
  
      Raises:
        IOError: when the storage writer is closed.
        OSError: when the storage writer is closed.