'Get balancer attribute
:param balancer: the balancer to get attribute
:type balancer: ``LoadBalancer``
:return: the balancer attribute
:rtype: ``SLBLoadBalancerAttribute``'

def ex_get_balancer_attribute(self, balancer):

    params = {'Action': 'DescribeLoadBalancerAttribute', 'LoadBalancerId': balancer.id}
    resp_body = self.connection.request(self.path, params).object
    attribute = self._to_balancer_attribute(resp_body)
    return attribute
