'Describes attribute of the volume.
:type volume_id: str
:param volume_id: The ID of the volume.
:type attribute: str
:param attribute: The requested attribute.  Valid values are:
* autoEnableIO
:type dry_run: bool
:param dry_run: Set to True if the operation should not actually run.
:rtype: list of :class:`boto.ec2.volume.VolumeAttribute`
:return: The requested Volume attribute'

def get_volume_attribute(self, volume_id, attribute='autoEnableIO', dry_run=False):

    params = {'VolumeId': volume_id, 'Attribute': attribute}
    if dry_run:
        params['DryRun'] = 'true'
    return self.get_object('DescribeVolumeAttribute', params, VolumeAttribute, verb='POST')
