bugfix for rnn tutorial on Python3
bugfix for rnn tutorial on Python3

sshleifer/object_detection_kitti,sshleifer/object_detection_kitti,sshleifer/object_detection_kitti,derekjchow/models,tombstone/models,alexgorban/models,alexgorban/models,alexgorban/models,jiaphuan/models,cshallue/models,tombstone/models,tombstone/models,jiaphuan/models,sshleifer/object_detection_kitti,jiaphuan/models,tombstone/models,cshallue/models,derekjchow/models,sshleifer/object_detection_kitti,jiaphuan/models,alexgorban/models,cshallue/models,jiaphuan/models,derekjchow/models,cshallue/models,alexgorban/models,tombstone/models,derekjchow/models,jiaphuan/models,sshleifer/object_detection_kitti,derekjchow/models,tombstone/models,cshallue/models