code: def ptmsiReallocationCommand(PTmsiSignature_presence=0):
      
      a = TpPd(pd=0x3)
      b = MessageType(mesType=0x10)  # 00010000
      c = MobileId()
      d = RoutingAreaIdentification()
      e = ForceToStandbyAndSpareHalfOctets()
      packet = a / b / c / d / e
      if PTmsiSignature_presence is 1:
          g = PTmsiSignature(ieiPTS=0x19)
          packet = packet / g
      return packet
docs: P-TMSI REALLOCATION COMMAND Section 9.4.7