1. converted examples from python2 to compatible python3 version;

2. for examples with remote data, changed the data path from "/tmp/dataset" to "./dataset/file_name"

3. added :
       config = tf.ConfigProto()
       config.gpu_options.allow_growth=True
       sess = tf.Session(config=config)

       for gpu memory increasing.
4. reformatted files

5. tested on Orion notebook.