Issue while generating pre training data

[008karan]

I am generating pre training data for hindi, I am using sentence piece vocab for it. Getting the following error.

python build_pretraining_dataset.py --corpus-dir data --vocab-file spie
ce.vocab --output-dir out --max-seq-length 128 --num-processes 1
Job 0: Creating example writer
Job 0: Writing tf examples
Traceback (most recent call last):
  File "build_pretraining_dataset.py", line 230, in <module>
    main()
  File "build_pretraining_dataset.py", line 218, in main
    write_examples(0, args)
  File "build_pretraining_dataset.py", line 190, in write_examples
    example_writer.write_examples(os.path.join(args.corpus_dir, fname))
  File "build_pretraining_dataset.py", line 143, in write_examples
    example = self._example_builder.add_line(line)
  File "build_pretraining_dataset.py", line 50, in add_line
    bert_tokids = self._tokenizer.convert_tokens_to_ids(bert_tokens)
  File "/home/gamut/Downloads/electra-master/model/tokenization.py", line 130, in convert_tokens_to_ids
    return convert_by_vocab(self.vocab, tokens)
  File "/home/gamut/Downloads/electra-master/model/tokenization.py", line 91, in convert_by_vocab
    output.append(vocab[item])
KeyError: '[UNK]'

I found that this kind of error have this solution. As here, there is only input for vocab and not for spice model, generation of pre training data through spiece vocab is problem, any solution?

[stefan-it]

Hi @008karan,

you can use SentencePiece, but afterwards you need to convert the SPM vocab to a BERT-compatible one. E.g. you could use the following script:

import sys

sp_vocab = sys.argv[1]

# Static
bert_vocab = ['[PAD]']
bert_vocab += [f'unused{i}' for i in range(0,100)]
bert_vocab += ['[UNK]', '[CLS]', '[SEP]', '[MASK]']

sp_special_symbols = ['<unk>', '<s>', '</s>']

with open(sp_vocab, 'rt') as f_p:
        bert_vocab += [("##" + line.split()[0]).replace('##▁', '') for line in f_p
                                   if line.split()[0] not in sp_special_symbols]

        print("\n".join(bert_vocab))

(Input file would be the SPM vocab file, output is a BERT-compatible vocab file).

However, I would highly recommend using the Hugging Face Tokenizers library for that.

Here are some code snippets for using the Tokenizers library in order to create a BERT-compatible vocab:

https://github.com/stefan-it/turkish-bert/blob/master/CHEATSHEET.md#cased-model

I used it for creating the vocab file for the Turkish BERT model.

[008karan]

@stefan-it I changed the vocab to berts format from your provided code snippet. Thanks!

One strange thing I found that my training data had a size of around 22 Gb and after generating pre-training data has size of 13 Gb. Usually, it should be bigger than the original data size.

[ddofer]

Would it be possible to provide an example of how to run the vocab/tokenizing in advance on this data, including the expected output sentencepiece vocab?

[parmarsuraj99]

Huggingface's tokenizer library worked like a charm.

from tokenizers import BertWordPieceTokenizer
tokenizer = BertWordPieceTokenizer(handle_chinese_chars=False, strip_accents=False, lowercase=False)
tokenizer.train(files="/content/corpus_dir/gu.txt")
tokenizer.save("BertWordPieceTokenizer")

[008karan]

@parmarsuraj99 Are you training using HF library?

[parmarsuraj99]

Yes, to train tokenizer and then I use vocab.txt in build_pretraining_dataset.py. It works.

[008karan]

Is HF Electra pertaining method available? They were going to publish it.

[parmarsuraj99]

For ELECTRA?maybe not. I tried importing Electra form transformers. Maybe They are working on that. But you can still use Bert Tokenizer. It works well.

[Sagar1094]

I created the vocabulary file using the above mentioned link and still facing the issue.

Job 0: Creating example writer Job 0: Writing tf examples Traceback (most recent call last): File "build_pretraining_dataset.py", line 230, in main() File "build_pretraining_dataset.py", line 218, in main write_examples(0, args) File "build_pretraining_dataset.py", line 190, in write_examples example_writer.write_examples(os.path.join(args.corpus_dir, fname)) File "build_pretraining_dataset.py", line 143, in write_examples example = self._example_builder.add_line(line) File "build_pretraining_dataset.py", line 50, in add_line bert_tokids = self._tokenizer.convert_tokens_to_ids(bert_tokens) File "/content/drive/My Drive/electra-master/model/tokenization.py", line 130, in convert_tokens_to_ids return convert_by_vocab(self.vocab, tokens) File "/content/drive/My Drive/electra-master/model/tokenization.py", line 91, in convert_by_vocab output.append(vocab[item]) KeyError: '[UNK]'

[stefan-it]

@Sagar1094 could you check that the path to the vocab file is correct? I've seen this error message also in cases, where the pathname to the vocab file was not correct (when using the build_pretraining_dataset.py script.

[Sagar1094]

Hi, I am using Google colab for running the script build_pretraining_dataset.py and the vocab.txt file is placed in google drive. I have mounted the drive as well.

Here is the code snippet:- !python build_pretraining_dataset.py
--corpus-dir='/content/drive/My Drive/Corpus_dir/'
--output-dir='/content/drive/My Drive/tf/'
--vocab-file='/content/drive/My Drive/Vocab_dir/'
--max-seq-length=128
--do-lower-case

And output of !ls '/content/drive/My Drive/Vocab_dir/' vocab.txt

Also the output of !head -20 '/content/drive/My Drive/Vocab_dir/vocab.txt'

[PAD] [UNK] [CLS] [SEP] [MASK] 0 1 2 3 4 5 6 7 8 9 a b c d e

Let me know if I am missing out on something. Thanks

[stefan-it]

Ah, you should pass `--vocab-file='/content/drive/My Drive/Vocab_dir/vocab.txt' as argument (using the folder name only is not sufficient) :)

[Sagar1094]

Thanks a lot, I just missed to mention the file name. Silly :)

[IssaIssa1]

Hi, I am using Google colab for running the script build_pretraining_dataset.py and the vocab.txt file is placed in google drive. I have mounted the drive as well.

Here is the code snippet:- !python build_pretraining_dataset.py --corpus-dir='/content/drive/My Drive/Corpus_dir/' --output-dir='/content/drive/My Drive/tf/' --vocab-file='/content/drive/My Drive/Vocab_dir/' --max-seq-length=128 --do-lower-case

And output of !ls '/content/drive/My Drive/Vocab_dir/' vocab.txt

Also the output of !head -20 '/content/drive/My Drive/Vocab_dir/vocab.txt'

[PAD] [UNK] [CLS] [SEP] [MASK] 0 1 2 3 4 5 6 7 8 9 a b c d e

Let me know if I am missing out on something. Thanks

May you please share the tokenizer training and saving script?

[elyorman]

(electra) ubuntu@nipa2020-0706:~/EL/electra/electra$ python3 build_openwebtext_pretraining_dataset.py --data-dir DATA_DIR --num-processes 5 Job 0: Creating example writer Process Process-1: Job 2: Creating example writer Traceback (most recent call last): File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 297, in _bootstrap self.run() File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 99, in run self._target(*self._args, **self._kwargs) File "build_openwebtext_pretraining_dataset.py", line 47, in write_examples do_lower_case=args.do_lower_case File "/home/ubuntu/EL/electra/electra/build_pretraining_dataset.py", line 126, in __init__ do_lower_case=do_lower_case) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 116, in __init__ self.vocab = load_vocab(vocab_file) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 78, in load_vocab token = convert_to_unicode(reader.readline()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 179, in readline return self._prepare_value(self._read_buf.ReadLineAsString()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 98, in _prepare_value return compat.as_str_any(val) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 123, in as_str_any return as_str(value) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 93, in as_text return bytes_or_text.decode(encoding) UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd7 in position 0: invalid continuation byte Job 3: Creating example writer Job 1: Creating example writer Job 4: Creating example writer Process Process-3: Traceback (most recent call last): File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 297, in _bootstrap self.run() File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 99, in run self._target(*self._args, **self._kwargs) File "build_openwebtext_pretraining_dataset.py", line 47, in write_examples do_lower_case=args.do_lower_case File "/home/ubuntu/EL/electra/electra/build_pretraining_dataset.py", line 126, in __init__ do_lower_case=do_lower_case) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 116, in __init__ self.vocab = load_vocab(vocab_file) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 78, in load_vocab token = convert_to_unicode(reader.readline()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 179, in readline return self._prepare_value(self._read_buf.ReadLineAsString()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 98, in _prepare_value return compat.as_str_any(val) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 123, in as_str_any return as_str(value) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 93, in as_text return bytes_or_text.decode(encoding) UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd7 in position 0: invalid continuation byte Process Process-4: Traceback (most recent call last): File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 297, in _bootstrap self.run() File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 99, in run self._target(*self._args, **self._kwargs) File "build_openwebtext_pretraining_dataset.py", line 47, in write_examples do_lower_case=args.do_lower_case File "/home/ubuntu/EL/electra/electra/build_pretraining_dataset.py", line 126, in __init__ do_lower_case=do_lower_case) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 116, in __init__ self.vocab = load_vocab(vocab_file) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 78, in load_vocab token = convert_to_unicode(reader.readline()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 179, in readline return self._prepare_value(self._read_buf.ReadLineAsString()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 98, in _prepare_value return compat.as_str_any(val) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 123, in as_str_any return as_str(value) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 93, in as_text return bytes_or_text.decode(encoding) UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd7 in position 0: invalid continuation byte Process Process-2: Traceback (most recent call last): File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 297, in _bootstrap self.run() File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 99, in run self._target(*self._args, **self._kwargs) File "build_openwebtext_pretraining_dataset.py", line 47, in write_examples do_lower_case=args.do_lower_case File "/home/ubuntu/EL/electra/electra/build_pretraining_dataset.py", line 126, in __init__ do_lower_case=do_lower_case) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 116, in __init__ self.vocab = load_vocab(vocab_file) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 78, in load_vocab token = convert_to_unicode(reader.readline()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 179, in readline return self._prepare_value(self._read_buf.ReadLineAsString()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 98, in _prepare_value return compat.as_str_any(val) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 123, in as_str_any return as_str(value) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 93, in as_text return bytes_or_text.decode(encoding) UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd7 in position 0: invalid continuation byte Process Process-5: Traceback (most recent call last): File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 297, in _bootstrap self.run() File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/multiprocessing/process.py", line 99, in run self._target(*self._args, **self._kwargs) File "build_openwebtext_pretraining_dataset.py", line 47, in write_examples do_lower_case=args.do_lower_case File "/home/ubuntu/EL/electra/electra/build_pretraining_dataset.py", line 126, in __init__ do_lower_case=do_lower_case) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 116, in __init__ self.vocab = load_vocab(vocab_file) File "/home/ubuntu/EL/electra/electra/model/tokenization.py", line 78, in load_vocab token = convert_to_unicode(reader.readline()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 179, in readline return self._prepare_value(self._read_buf.ReadLineAsString()) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/lib/io/file_io.py", line 98, in _prepare_value return compat.as_str_any(val) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 123, in as_str_any return as_str(value) File "/home/ubuntu/anaconda3/envs/electra/lib/python3.7/site-packages/tensorflow_core/python/util/compat.py", line 93, in as_text return bytes_or_text.decode(encoding) UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd7 in position 0: invalid continuation byte

I am having this error while running build_openwebtext_pretraining_dataset.py --data-dir DATA_DIR --num-processes 5 Can anyone help with this please?