import roslibpy

client = roslibpy.Ros(host='localhost', port=9090)
client.run()

service = roslibpy.Service(client, '/rosout/get_loggers', 'roscpp/GetLoggers')
request = roslibpy.ServiceRequest()

print('Calling service...')
result = service.call(request)
print('Service response: {}'.format(result['loggers']))

client.terminate()