似乎MonitoredTrainingSession在第一次调用.run(..)之前做了一些操作(logging？),这意味着当我这样做时:
train_data = reader.traindata() # returns a tf.contrib.data.Dataset
it = tf.contrib.data.Iterator.from_structure(train_data.output_types, train_data.output_shapes)
init_train = it.make_initializer(train_data)
ne = it.get_next()
ts = tf.train.MonitoredTrainingSession(checkpoint_dir=save_path)
... no calls to ts.run ...
ts.run(init_train)
这会产生错误:
FailedPreconditionError (see above for traceback): GetNext() failed because the iterator has not been initialized. Ensure that you have run the initializer operation for this iterator before getting the next element
因此,在运行我提供的操作之前,它就像MonitoredTrainingSession正在执行某些操作一样接缝,从而无法使用来自Dataset的可重新初始化的迭代器进行togeather.
我相信我错过了一些东西,并希望听到:-)