SOLVED!

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

#from prometheus_client import start_http_server, Summary
import prometheus_client as prom
import random
import time

import pika
queue_name = [
 "capt",
 "dev-capt",
 "myBeautifullTest"
]


params = pika.ConnectionParameters(
    host='rabbitmq1.local',
    port=5672,
    credentials=pika.credentials.PlainCredentials('guest11', 'guest22'),
)

connection = pika.BlockingConnection(parameters=params)
channel = connection.channel()

i = prom.Info("RMQPE", "RabbitMQ Prometheus Exporter")
i.info({'version': '0.0.1'})

# Create a metric to track time spent and requests made.
REQUEST_TIME = prom.Summary('request_processing_seconds', 'Time spent processing request')

# Decorate function with metric.
@REQUEST_TIME.time()
def process_request():
    time.sleep(1)


if __name__ == '__main__':
    #                          name                        documentation    labelnames
    RABBIT_QUEUE = prom.Gauge('rabbitmq_test_exporter', 'queue_length', labelnames=['queue_name'])

    prom.start_http_server(27015)
    while True:
        process_request()

        for qname in queue_name:
            queue_descriptor = channel.queue_declare(qname, durable=True)
            queue_len = queue_descriptor.method.message_count
            RABBIT_QUEUE.labels(qname).set(queue_len)