Remove deprecated properties from dataset class

[yd8534976]

What this patch does to fix the issue.

Remove some deprecated properties from dataset class. These feature will be done in

blueoil/blueoil/datasets/dataset_iterator.py

Lines 287 to 363 in e578430

	class DatasetIterator:
	available_subsets = ["train", "validation"]
	"""docstring for DatasetIterator."""
	def __init__(self, dataset, enable_prefetch=False, seed=0, local_rank=-1):
	self.dataset = dataset
	self.enable_prefetch = enable_prefetch
	self.seed = seed
	if issubclass(dataset.__class__, TFDSMixin):
	self.enable_prefetch = False
	self.reader = _TFDSReader(self.dataset, local_rank)
	else:
	if self.enable_prefetch:
	self.prefetch_result_queue = queue.Queue(maxsize=200)
	self.prefetcher = _MultiProcessDatasetPrefetchThread(self.dataset, self.prefetch_result_queue, seed)
	self.prefetcher.start()
	print("ENABLE prefetch")
	else:
	self.reader = _SimpleDatasetReader(self.dataset, seed)
	print("DISABLE prefetch")
	@property
	def num_per_epoch(self):
	return self.dataset.num_per_epoch
	@property
	def classes(self):
	return self.dataset.classes
	@property
	def num_classes(self):
	return self.dataset.num_classes
	@property
	def num_max_boxes(self):
	return self.dataset.num_max_boxes
	@property
	def label_colors(self):
	return self.dataset.label_colors
	def extend_dir(self):
	return self.dataset.extend_dir
	def __iter__(self):
	return self
	def __next__(self):
	if self.enable_prefetch:
	(images, labels) = self.prefetch_result_queue.get()
	else:
	images, labels = self.reader.read()
	return images, labels
	def feed(self):
	return self.__next__()
	def __len__(self):
	return len(self.dataset)
	def update_dataset(self, indices):
	"""Update own dataset by indices."""
	# do nothing so far
	return
	def get_shuffle_index(self):
	"""Return list of shuffled index."""
	random_state = np.random.RandomState(self.seed)
	random_indices = list(range(self.num_per_epoch))
	random_state.shuffle(random_indices)
	print("Shuffle {} train dataset with random state {}.".format(self.__class__.__name__, self.seed))
	print(random_indices[0:10])
	self.seed += 1
	return random_indices

.

Link to any relevant issues or pull requests.

[bo-code-review-bot]

This PR needs Approvals as follows.

• Ownership Approval for / from iizukak, tkng, ruimashita
• Readability Approval for Python from tkng, tsawada, tfujiwar

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[tfujiwar]

Thanks for cleaning up.

[tfujiwar]

This method is called in dataset_iterator.py but I think it's not needed. Could you refactor it also?

[iizukak]

Thanks.
Good refactoring.
OA

[tfujiwar]

Readability Approval
Thank you!