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377
transformers/tests/models/plbart/test_tokenization_plbart.py
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377
transformers/tests/models/plbart/test_tokenization_plbart.py
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# Copyright 2022 The HuggingFace Team. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import tempfile
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import unittest
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from transformers import SPIECE_UNDERLINE, BatchEncoding, PLBartTokenizer, is_torch_available
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from transformers.testing_utils import (
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get_tests_dir,
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nested_simplify,
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require_sentencepiece,
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require_tokenizers,
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require_torch,
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)
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from ...test_tokenization_common import TokenizerTesterMixin
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SAMPLE_VOCAB = get_tests_dir("fixtures/test_sentencepiece.model")
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if is_torch_available():
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from transformers.models.plbart.modeling_plbart import shift_tokens_right
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EN_CODE = 50003
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PYTHON_CODE = 50002
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@require_sentencepiece
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@require_tokenizers
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class PLBartTokenizationTest(TokenizerTesterMixin, unittest.TestCase):
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from_pretrained_id = "uclanlp/plbart-base"
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tokenizer_class = PLBartTokenizer
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rust_tokenizer_class = None
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test_rust_tokenizer = False
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@classmethod
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def setUpClass(cls):
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super().setUpClass()
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# We have a SentencePiece fixture for testing
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tokenizer = PLBartTokenizer(SAMPLE_VOCAB, language_codes="base", keep_accents=True)
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tokenizer.save_pretrained(cls.tmpdirname)
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def test_full_base_tokenizer(self):
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tokenizer = PLBartTokenizer(SAMPLE_VOCAB, language_codes="base", keep_accents=True)
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tokens = tokenizer.tokenize("This is a test")
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self.assertListEqual(tokens, ["▁This", "▁is", "▁a", "▁t", "est"])
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self.assertListEqual(
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tokenizer.convert_tokens_to_ids(tokens),
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[value + tokenizer.fairseq_offset for value in [285, 46, 10, 170, 382]],
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)
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tokens = tokenizer.tokenize("I was born in 92000, and this is falsé.")
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self.assertListEqual(
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tokens,
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[
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SPIECE_UNDERLINE + "I",
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SPIECE_UNDERLINE + "was",
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SPIECE_UNDERLINE + "b",
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"or",
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"n",
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SPIECE_UNDERLINE + "in",
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SPIECE_UNDERLINE + "",
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"9",
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"2",
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"0",
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"0",
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"0",
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",",
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SPIECE_UNDERLINE + "and",
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SPIECE_UNDERLINE + "this",
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SPIECE_UNDERLINE + "is",
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SPIECE_UNDERLINE + "f",
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"al",
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"s",
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"é",
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".",
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],
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)
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ids = tokenizer.convert_tokens_to_ids(tokens)
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self.assertListEqual(
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ids,
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[
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value + tokenizer.fairseq_offset
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for value in [8, 21, 84, 55, 24, 19, 7, 2, 602, 347, 347, 347, 3, 12, 66, 46, 72, 80, 6, 2, 4]
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],
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)
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back_tokens = tokenizer.convert_ids_to_tokens(ids)
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self.assertListEqual(
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back_tokens,
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[
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SPIECE_UNDERLINE + "I",
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SPIECE_UNDERLINE + "was",
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SPIECE_UNDERLINE + "b",
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"or",
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"n",
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SPIECE_UNDERLINE + "in",
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SPIECE_UNDERLINE + "",
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"<unk>",
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"2",
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"0",
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"0",
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"0",
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",",
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SPIECE_UNDERLINE + "and",
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SPIECE_UNDERLINE + "this",
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SPIECE_UNDERLINE + "is",
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SPIECE_UNDERLINE + "f",
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"al",
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"s",
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"<unk>",
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".",
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],
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)
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end = tokenizer.vocab_size
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language_tokens = [tokenizer.convert_ids_to_tokens(x) for x in range(end - 4, end)]
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self.assertListEqual(language_tokens, ["__java__", "__python__", "__en_XX__", "<mask>"])
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code = "java.lang.Exception, python.lang.Exception, javascript, php, ruby, go"
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input_ids = tokenizer(code).input_ids
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self.assertEqual(
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tokenizer.decode(input_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False),
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code,
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)
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def test_full_multi_tokenizer(self):
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tokenizer = PLBartTokenizer(SAMPLE_VOCAB, language_codes="multi", keep_accents=True)
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tokens = tokenizer.tokenize("This is a test")
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self.assertListEqual(tokens, ["▁This", "▁is", "▁a", "▁t", "est"])
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self.assertListEqual(
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tokenizer.convert_tokens_to_ids(tokens),
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[value + tokenizer.fairseq_offset for value in [285, 46, 10, 170, 382]],
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)
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tokens = tokenizer.tokenize("I was born in 92000, and this is falsé.")
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self.assertListEqual(
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tokens,
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[
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SPIECE_UNDERLINE + "I",
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SPIECE_UNDERLINE + "was",
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SPIECE_UNDERLINE + "b",
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"or",
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"n",
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SPIECE_UNDERLINE + "in",
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SPIECE_UNDERLINE + "",
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"9",
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"2",
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"0",
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"0",
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"0",
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",",
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SPIECE_UNDERLINE + "and",
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SPIECE_UNDERLINE + "this",
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SPIECE_UNDERLINE + "is",
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SPIECE_UNDERLINE + "f",
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"al",
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"s",
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"é",
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".",
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],
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)
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ids = tokenizer.convert_tokens_to_ids(tokens)
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self.assertListEqual(
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ids,
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[
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value + tokenizer.fairseq_offset
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for value in [8, 21, 84, 55, 24, 19, 7, 2, 602, 347, 347, 347, 3, 12, 66, 46, 72, 80, 6, 2, 4]
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],
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)
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back_tokens = tokenizer.convert_ids_to_tokens(ids)
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self.assertListEqual(
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back_tokens,
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[
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SPIECE_UNDERLINE + "I",
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SPIECE_UNDERLINE + "was",
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SPIECE_UNDERLINE + "b",
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"or",
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"n",
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SPIECE_UNDERLINE + "in",
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SPIECE_UNDERLINE + "",
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"<unk>",
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"2",
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"0",
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"0",
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"0",
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",",
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SPIECE_UNDERLINE + "and",
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SPIECE_UNDERLINE + "this",
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SPIECE_UNDERLINE + "is",
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SPIECE_UNDERLINE + "f",
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"al",
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"s",
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"<unk>",
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".",
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],
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)
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end = tokenizer.vocab_size
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language_tokens = [tokenizer.convert_ids_to_tokens(x) for x in range(end - 7, end)]
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self.assertListEqual(
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language_tokens, ["__java__", "__python__", "__en_XX__", "__javascript__", "__php__", "__ruby__", "__go__"]
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)
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code = "java.lang.Exception, python.lang.Exception, javascript, php, ruby, go"
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input_ids = tokenizer(code).input_ids
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self.assertEqual(
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tokenizer.decode(input_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False),
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code,
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)
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@require_torch
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@require_sentencepiece
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@require_tokenizers
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class PLBartPythonEnIntegrationTest(unittest.TestCase):
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checkpoint_name = "uclanlp/plbart-python-en_XX"
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src_text = [
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"def maximum(a,b,c):NEW_LINE_INDENTreturn max([a,b,c])",
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"def sum(a,b,c):NEW_LINE_INDENTreturn sum([a,b,c])",
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]
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tgt_text = [
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"Returns the maximum value of a b c.",
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"Sums the values of a b c.",
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]
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expected_src_tokens = [
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134,
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5452,
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33460,
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33441,
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33463,
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33465,
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33463,
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33449,
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988,
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20,
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33456,
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19,
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33456,
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771,
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39,
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4258,
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889,
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3318,
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33441,
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33463,
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33465,
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33463,
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33449,
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2471,
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2,
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PYTHON_CODE,
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]
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@classmethod
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def setUpClass(cls):
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cls.tokenizer: PLBartTokenizer = PLBartTokenizer.from_pretrained(
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cls.checkpoint_name, language_codes="base", src_lang="python", tgt_lang="en_XX"
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)
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cls.pad_token_id = 1
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return cls
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def check_language_codes(self):
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self.assertEqual(self.tokenizer.fairseq_tokens_to_ids["__java__"], 50001)
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self.assertEqual(self.tokenizer.fairseq_tokens_to_ids["__python__"], 50002)
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self.assertEqual(self.tokenizer.fairseq_tokens_to_ids["__en_XX__"], 50003)
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def test_python_en_tokenizer_batch_encode_plus(self):
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ids = self.tokenizer.batch_encode_plus(self.src_text).input_ids[0]
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self.assertListEqual(self.expected_src_tokens, ids)
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def test_python_en_tokenizer_decode_ignores_language_codes(self):
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self.assertIn(PYTHON_CODE, self.tokenizer.all_special_ids)
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generated_ids = [EN_CODE, 9037, 33442, 57, 752, 153, 14, 56, 18, 9, 2]
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result = self.tokenizer.decode(generated_ids, skip_special_tokens=True)
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expected_english = self.tokenizer.decode(generated_ids[1:], skip_special_tokens=True)
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self.assertEqual(result, expected_english)
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self.assertNotIn(self.tokenizer.eos_token, result)
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def test_python_en_tokenizer_truncation(self):
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src_text = ["def sum(a,b,c):NEW_LINE_INDENTreturn sum([a,b,c])" * 20]
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self.assertIsInstance(src_text[0], str)
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desired_max_length = 10
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ids = self.tokenizer(src_text, max_length=desired_max_length, truncation=True).input_ids[0]
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self.assertEqual(ids[-2], 2)
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self.assertEqual(ids[-1], PYTHON_CODE)
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self.assertEqual(len(ids), desired_max_length)
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def test_mask_token(self):
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self.assertListEqual(self.tokenizer.convert_tokens_to_ids(["<mask>", "__java__"]), [50004, 50001])
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def test_special_tokens_unaffacted_by_save_load(self):
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tmpdirname = tempfile.mkdtemp()
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original_special_tokens = self.tokenizer.fairseq_tokens_to_ids
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self.tokenizer.save_pretrained(tmpdirname)
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new_tok = PLBartTokenizer.from_pretrained(tmpdirname)
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self.assertDictEqual(new_tok.fairseq_tokens_to_ids, original_special_tokens)
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@require_torch
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def test_batch_fairseq_parity(self):
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batch = self.tokenizer(self.src_text, text_target=self.tgt_text, padding=True, return_tensors="pt")
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batch["decoder_input_ids"] = shift_tokens_right(batch["labels"], self.tokenizer.pad_token_id)
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# fairseq batch: https://gist.github.com/sshleifer/cba08bc2109361a74ac3760a7e30e4f4
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self.assertEqual(batch.input_ids[1][-2:].tolist(), [2, PYTHON_CODE])
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self.assertEqual(batch.decoder_input_ids[1][0], EN_CODE)
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self.assertEqual(batch.decoder_input_ids[1][-1], 2)
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self.assertEqual(batch.labels[1][-2:].tolist(), [2, EN_CODE])
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@require_torch
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def test_python_en_tokenizer_prepare_batch(self):
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batch = self.tokenizer(
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self.src_text,
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text_target=self.tgt_text,
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padding=True,
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truncation=True,
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max_length=len(self.expected_src_tokens),
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return_tensors="pt",
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)
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batch["decoder_input_ids"] = shift_tokens_right(batch["labels"], self.tokenizer.pad_token_id)
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self.assertIsInstance(batch, BatchEncoding)
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self.assertEqual((2, 26), batch.input_ids.shape)
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self.assertEqual((2, 26), batch.attention_mask.shape)
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result = batch.input_ids.tolist()[0]
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self.assertListEqual(self.expected_src_tokens, result)
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self.assertEqual(2, batch.decoder_input_ids[0, -1]) # EOS
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# Test that special tokens are reset
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self.assertEqual(self.tokenizer.prefix_tokens, [])
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self.assertEqual(self.tokenizer.suffix_tokens, [self.tokenizer.eos_token_id, PYTHON_CODE])
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def test_seq2seq_max_length(self):
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batch = self.tokenizer(self.src_text, padding=True, truncation=True, max_length=3, return_tensors="pt")
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targets = self.tokenizer(
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text_target=self.tgt_text, padding=True, truncation=True, max_length=10, return_tensors="pt"
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)
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labels = targets["input_ids"]
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batch["decoder_input_ids"] = shift_tokens_right(labels, self.tokenizer.pad_token_id)
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self.assertEqual(batch.input_ids.shape[1], 3)
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self.assertEqual(batch.decoder_input_ids.shape[1], 10)
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@require_torch
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def test_tokenizer_translation(self):
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inputs = self.tokenizer._build_translation_inputs(
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"A test", return_tensors="pt", src_lang="en_XX", tgt_lang="java"
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)
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self.assertEqual(
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nested_simplify(inputs),
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{
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# A, test, EOS, en_XX
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"input_ids": [[150, 242, 2, 50003]],
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"attention_mask": [[1, 1, 1, 1]],
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# java
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"forced_bos_token_id": 50001,
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},
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)
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