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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. | |
| from . import BaseWrapperDataset | |
| class StripTokenDataset(BaseWrapperDataset): | |
| def __init__(self, dataset, id_to_strip): | |
| super().__init__(dataset) | |
| self.id_to_strip = id_to_strip | |
| def __getitem__(self, index): | |
| item = self.dataset[index] | |
| while len(item) > 0 and item[-1] == self.id_to_strip: | |
| item = item[:-1] | |
| while len(item) > 0 and item[0] == self.id_to_strip: | |
| item = item[1:] | |
| return item | |