'Set a single value for this subject\'s attribute.
Args:
subject: The subject this applies to.
attribute: Attribute name.
value: serialized value into one of the supported types.
timestamp: The timestamp for this entry in microseconds since the
epoch. If None means now.
token: An ACL token.
replace: Bool whether or not to overwrite current records.
sync: If true we ensure the new values are committed before returning.'

def Set(self, subject, attribute, value, timestamp=None, token=None, replace=True, sync=True):

    self.MultiSet(subject, {attribute: [value]}, timestamp=timestamp, token=token, replace=replace, sync=sync)
