code: def process_mock_rpc(input_string):
      
  
      spec, equals, value = input_string.partition(u'=')
  
      if len(equals) == 0:
          print("Could not parse mock RPC argument: {}".format(input_string))
          sys.exit(1)
  
      try:
          value = int(value.strip(), 0)
      except ValueError as exc:
          print("Could not parse mock RPC value: {}".format(str(exc)))
          sys.exit(1)
  
      slot, part, rpc_id = spec.partition(u":")
      if len(part) == 0:
          print("Could not parse mock RPC slot/rpc definition: {}".format(spec))
          sys.exit(1)
  
      try:
          slot = SlotIdentifier.FromString(slot)
      except ArgumentError as exc:
          print("Could not parse slot id in mock RPC definition: {}".format(exc.msg))
          sys.exit(1)
  
      try:
          rpc_id = int(rpc_id, 0)
      except ValueError as exc:
          print("Could not parse mock RPC number: {}".format(str(exc)))
          sys.exit(1)
  
      return slot, rpc_id, value
docs: Process a mock RPC argument.
  
      Args:
          input_string (str): The input string that should be in the format
              <slot id>:<rpc id> = value