import tensorflow as tf

queue = tf.FIFOQueue(100,"float")
enqueue_op = queue.enqueue([tf.random_normal([1])])
qr = tf.train.QueueRunner(queue, [enqueue_op] * 5)
tf.train.add_queue_runner(qr)
out_tensor = queue.dequeue()

with tf.Session() as sess:
    coord = tf.train.Coordinator()
    threads = tf.train.start_queue_runners(sess=sess, coord=coord)
    for _ in range(3): 
        print(sess.run(out_tensor)[0])
    coord.request_stop()
    coord.join(threads)