<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def add_object(self, obj):
 """ Adds a RiakObject to the inputs. :param obj: the object to add :type obj: RiakObject :rtype: :class:`RiakMapReduce` """

        return self.add_bucket_key_data(obj._bucket._name, obj._key, None)