old_contents: import struct
  
  REQ_MAGIC          = "\0REQ"
  RES_MAGIC          = "\0RES"
  
  CAN_DO             = 1
  CANT_DO            = 2
  RESET_ABILITIES    = 3
  PRE_SLEEP          = 4
  NOOP               = 6
  SUBMIT_JOB         = 7
  JOB_CREATED        = 8
  GRAB_JOB           = 9
  NO_JOB             = 10
  JOB_ASSIGN         = 11
  WORK_STATUS        = 12
  WORK_COMPLETE      = 13
  WORK_FAIL          = 14
  GET_STATUS         = 15
  ECHO_REQ           = 16
  ECHO_RES           = 17
  SUBMIT_JOB_BG      = 18
  ERROR              = 19
  STATUS_RES         = 20
  SUBMIT_JOB_HIGH    = 21
  SET_CLIENT_ID      = 22
  CAN_DO_TIMEOUT     = 23
  ALL_YOURS          = 24
  WORK_EXCEPTION     = 25
  OPTION_REQ         = 26
  OPTION_RES         = 27
  WORK_DATA          = 28
  WORK_WARNING       = 29
  GRAB_JOB_UNIQ      = 30
  JOB_ASSIGN_UNIQ    = 31
  SUBMIT_JOB_HIGH_BG = 32
  SUBMIT_JOB_LOW     = 33
  SUBMIT_JOB_LOW_BG  = 34
  SUBMIT_JOB_SCHED   = 35
  SUBMIT_JOB_EPOCH   = 36
  
  # Magic, type, data size
  PKT_FMT = ">III"
  HEADER_LEN = struct.calcsize(PKT_FMT)
  
new_contents: """Protocol definitions."""
  
  import struct
  
  REQ_MAGIC          = "\0REQ"
  RES_MAGIC          = "\0RES"
  
  CAN_DO             = 1
  CANT_DO            = 2
  RESET_ABILITIES    = 3
  PRE_SLEEP          = 4
  NOOP               = 6
  SUBMIT_JOB         = 7
  JOB_CREATED        = 8
  GRAB_JOB           = 9
  NO_JOB             = 10
  JOB_ASSIGN         = 11
  WORK_STATUS        = 12
  WORK_COMPLETE      = 13
  WORK_FAIL          = 14
  GET_STATUS         = 15
  ECHO_REQ           = 16
  ECHO_RES           = 17
  SUBMIT_JOB_BG      = 18
  ERROR              = 19
  STATUS_RES         = 20
  SUBMIT_JOB_HIGH    = 21
  SET_CLIENT_ID      = 22
  CAN_DO_TIMEOUT     = 23
  ALL_YOURS          = 24
  WORK_EXCEPTION     = 25
  OPTION_REQ         = 26
  OPTION_RES         = 27
  WORK_DATA          = 28
  WORK_WARNING       = 29
  GRAB_JOB_UNIQ      = 30
  JOB_ASSIGN_UNIQ    = 31
  SUBMIT_JOB_HIGH_BG = 32
  SUBMIT_JOB_LOW     = 33
  SUBMIT_JOB_LOW_BG  = 34
  SUBMIT_JOB_SCHED   = 35
  SUBMIT_JOB_EPOCH   = 36
  
  # Magic, type, data size
  PKT_FMT = ">III"
  HEADER_LEN = struct.calcsize(PKT_FMT)
  
subject: Document constants slightly.