#ruby code
aws_elb = AWS::ELB::Base.new( :access_key_id => aws_access_key_id, :secret_access_key => aws_secret_access_key )
mylb = aws_elb.describe_load_balancers(:names => "test-lb")
pp mylb.Listeners

#response
nil  <-output of the above pp.


#output of pp mylb (the whole load balanced object)
{"xmlns"=>"http://elasticloadbalancing.amazonaws.com/doc/2009-05-15/",
 "ResponseMetadata"=>{"RequestId"=>"81c587b3-dfe0-11e1-8645-9596bae18c43"},
 "DescribeLoadBalancersResult"=>
  {"LoadBalancerDescriptions"=>
    {"member"=>
      [{"Instances"=>
         {"member"=>
           [{"InstanceId"=>"i-ecb1c235"}, {"InstanceId"=>"i-ef123289"}]},
        "CreatedTime"=>"2012-05-11T14:45:15.960Z",
        "AvailabilityZones"=>{"member"=>["us-east-1b"]},
        "DNSName"=>"test-lb-1583208844.us-east-1.elb.amazonaws.com",
        "HealthCheck"=>
         {"Timeout"=>"5",
          "HealthyThreshold"=>"10",
          "Target"=>"TCP:8080",
          "UnhealthyThreshold"=>"2",
          "Interval"=>"12"},
        "LoadBalancerName"=>"test-lb",
        "Listeners"=>
         {"member"=>
           [{"Protocol"=>"HTTP",
             "InstancePort"=>"8080",
             "LoadBalancerPort"=>"80"}]}}]}}}