new_contents: from prisonarchitect import PrisonParser
  
  parser = PrisonParser()
  parser.load('autosave.prison')
  
  for prisoner in parser.find(section='Objects', filter=lambda sec: sec.attrs.get('Type', None) == 'Prisoner'):
      bio = prisoner.sections['Bio']
      bio['Served'] = bio['Sentence']
  
  parser.save('autosave.prison')
  
subject: add example for setting prisoner served time to total sentence