code: def disagg_outputs(value):
      
      values = value.replace(',', ' ').split()
      for val in values:
          if val not in disagg.pmf_map:
              raise ValueError('Invalid disagg output: %s' % val)
      return values
docs: Validate disaggregation outputs. For instance
  
      >>> disagg_outputs('TRT Mag_Dist')
      ['TRT', 'Mag_Dist']
      >>> disagg_outputs('TRT, Mag_Dist')
      ['TRT', 'Mag_Dist']