':type dry_run: bool
:param dry_run: Set to True if the operation should not actually run.'

def describe_vpc_attribute(self, vpc_id, attribute=None, dry_run=False):

    params = {'VpcId': vpc_id}
    if (attribute is not None):
        params['Attribute'] = attribute
    if dry_run:
        params['DryRun'] = 'true'
    return self.get_object('DescribeVpcAttribute', params, VPCAttribute, verb='POST')
