human
I am working on the file "Archive/Actors.ipynb".
The first task is:
We can then define an actor for this network as follows.
Can you write Python program for it?
 ... Give me a the Python program you requested?
assistant
#Here is the Python program you requested.

import os

# Define an actor that runs on GPUs. If there are no GPUs, then simply use
# ray.remote without any arguments and no parentheses.
@ray.remote(num_gpus=1)

class NeuralNetOnGPU(object):
    def __init__(self):
        # Set an environment variable to tell TensorFlow which GPUs to use.
        # Note that this must be done before the call to tf.Session.
        os.environ["CUDA_VISIBLE_DEVICES"] = ",".join([str(i) for i in 
                                                       ray.get_gpu_ids()])
        with tf.Graph().as_default():
            with tf.device("/gpu:0"):
                self.x, self.y_, self.train_step, self.accuray = construct
                _network()
                # Allow this to run on CPUs if there aren't any GPUs
                self.sess = tf.Session(config=config)
                # Initialize the network.
                init = tf.global_variables_initializer()
                self.sess.run(init)