174502 train + val 19079 test
python create_tfrecords.py
--image_dir=/home/dan/datasets/CelebA/val/images/
--annotations_dir=/home/dan/datasets/CelebA/val/annotations/
--output=data/val_shards/
--num_shards=100
python create_tfrecords.py
--image_dir=/home/dan/datasets/CelebA/train/images/
--annotations_dir=/home/dan/datasets/CelebA/train/annotations/
--output=data/train_shards/
--num_shards=500