为什么我的出了这么多的bug呢?训练时候又出来了如下的错误？

Process Process-1:
Traceback (most recent call last):
File “multigpu_train.py”, line 196, in
tf.app.run()
File “/usr/local/lib/python3.5/dist-packages/tensorflow/python/platform/app.py”, line 125, in run
_sys.exit(main(argv))
File “multigpu_train.py”, line 170, in main
ml, tl, _ = sess.run([model_loss, total_loss, train_op], feed_dict={input_images: data[0],
Process Process-1:
Traceback (most recent call last):
File “multigpu_train.py”, line 196, in
tf.app.run()
File “/usr/local/lib/python3.5/dist-packages/tensorflow/python/platform/app.py”, line 125, in run
_sys.exit(main(argv))
File “multigpu_train.py”, line 170, in main
ml, tl, _ = sess.run([model_loss, total_loss, train_op], feed_dict={input_images: data[0],
TypeError: ‘NoneType’ object is not subscriptable