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# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import numpy as np
from . import BaseWrapperDataset
class SortDataset(BaseWrapperDataset):
def __init__(self, dataset, sort_order):
super().__init__(dataset)
if not isinstance(sort_order, (list, tuple)):
sort_order = [sort_order]
self.sort_order = sort_order
assert all(len(so) == len(dataset) for so in sort_order)
def ordered_indices(self):
return np.lexsort(self.sort_order)
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