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language: fr |
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# CamemBERT: a Tasty French Language Model |
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## Introduction |
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[CamemBERT](https://arxiv.org/abs/1911.03894) is a state-of-the-art language model for French based on the RoBERTa model. |
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It is now available on Hugging Face in 6 different versions with varying number of parameters, amount of pretraining data and pretraining data source domains. |
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For further information or requests, please go to [Camembert Website](https://camembert-model.fr/) |
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## Pre-trained models |
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| Model | #params | Arch. | Training data | |
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|--------------------------------|--------------------------------|-------|-----------------------------------| |
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| `camembert-base` | 110M | Base | OSCAR (138 GB of text) | |
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| `camembert/camembert-large` | 335M | Large | CCNet (135 GB of text) | |
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| `camembert/camembert-base-ccnet` | 110M | Base | CCNet (135 GB of text) | |
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| `camembert/camembert-base-wikipedia-4gb` | 110M | Base | Wikipedia (4 GB of text) | |
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| `camembert/camembert-base-oscar-4gb` | 110M | Base | Subsample of OSCAR (4 GB of text) | |
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| `camembert/camembert-base-ccnet-4gb` | 110M | Base | Subsample of CCNet (4 GB of text) | |
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## How to use CamemBERT with HuggingFace |
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##### Load CamemBERT and its sub-word tokenizer : |
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```python |
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from transformers import CamembertModel, CamembertTokenizer |
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# You can replace "camembert-base" with any other model from the table, e.g. "camembert/camembert-large". |
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tokenizer = CamembertTokenizer.from_pretrained("camembert/camembert-base-oscar-4gb") |
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camembert = CamembertModel.from_pretrained("camembert/camembert-base-oscar-4gb") |
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camembert.eval() # disable dropout (or leave in train mode to finetune) |
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``` |
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##### Filling masks using pipeline |
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```python |
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from transformers import pipeline |
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camembert_fill_mask = pipeline("fill-mask", model="camembert/camembert-base-oscar-4gb", tokenizer="camembert/camembert-base-oscar-4gb") |
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>>> results = camembert_fill_mask("Le camembert est <mask> !") |
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# results |
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#[{'sequence': '<s> Le camembert est parfait!</s>', 'score': 0.04089554399251938, 'token': 1654}, |
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#{'sequence': '<s> Le camembert est délicieux!</s>', 'score': 0.037193264812231064, 'token': 7200}, |
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#{'sequence': '<s> Le camembert est prêt!</s>', 'score': 0.025467922911047935, 'token': 1415}, |
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#{'sequence': '<s> Le camembert est meilleur!</s>', 'score': 0.022812040522694588, 'token': 528}, |
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#{'sequence': '<s> Le camembert est différent!</s>', 'score': 0.017135459929704666, 'token': 2935}] |
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``` |
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##### Extract contextual embedding features from Camembert output |
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```python |
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import torch |
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# Tokenize in sub-words with SentencePiece |
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tokenized_sentence = tokenizer.tokenize("J'aime le camembert !") |
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# ['▁J', "'", 'aime', '▁le', '▁ca', 'member', 't', '▁!'] |
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# 1-hot encode and add special starting and end tokens |
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encoded_sentence = tokenizer.encode(tokenized_sentence) |
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# [5, 121, 11, 660, 16, 730, 25543, 110, 83, 6] |
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# NB: Can be done in one step : tokenize.encode("J'aime le camembert !") |
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# Feed tokens to Camembert as a torch tensor (batch dim 1) |
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encoded_sentence = torch.tensor(encoded_sentence).unsqueeze(0) |
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embeddings, _ = camembert(encoded_sentence) |
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# embeddings.detach() |
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# embeddings.size torch.Size([1, 10, 768]) |
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#tensor([[[-0.1120, -0.1464, 0.0181, ..., -0.1723, -0.0278, 0.1606], |
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# [ 0.1234, 0.1202, -0.0773, ..., -0.0405, -0.0668, -0.0788], |
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# [-0.0440, 0.0480, -0.1926, ..., 0.1066, -0.0961, 0.0637], |
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# ..., |
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``` |
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##### Extract contextual embedding features from all Camembert layers |
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```python |
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from transformers import CamembertConfig |
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# (Need to reload the model with new config) |
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config = CamembertConfig.from_pretrained("camembert/camembert-base-oscar-4gb", output_hidden_states=True) |
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camembert = CamembertModel.from_pretrained("camembert/camembert-base-oscar-4gb", config=config) |
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embeddings, _, all_layer_embeddings = camembert(encoded_sentence) |
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# all_layer_embeddings list of len(all_layer_embeddings) == 13 (input embedding layer + 12 self attention layers) |
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all_layer_embeddings[5] |
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# layer 5 contextual embedding : size torch.Size([1, 10, 768]) |
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#tensor([[[-0.1584, -0.1207, -0.0179, ..., 0.5457, 0.1491, -0.1191], |
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# [-0.1122, 0.3634, 0.0676, ..., 0.4395, -0.0470, -0.3781], |
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# [-0.2232, 0.0019, 0.0140, ..., 0.4461, -0.0233, 0.0735], |
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# ..., |
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``` |
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## Authors |
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CamemBERT was trained and evaluated by Louis Martin\*, Benjamin Muller\*, Pedro Javier Ortiz Suárez\*, Yoann Dupont, Laurent Romary, Éric Villemonte de la Clergerie, Djamé Seddah and Benoît Sagot. |
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## Citation |
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If you use our work, please cite: |
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```bibtex |
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@inproceedings{martin2020camembert, |
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title={CamemBERT: a Tasty French Language Model}, |
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author={Martin, Louis and Muller, Benjamin and Su{\'a}rez, Pedro Javier Ortiz and Dupont, Yoann and Romary, Laurent and de la Clergerie, {\'E}ric Villemonte and Seddah, Djam{\'e} and Sagot, Beno{\^\i}t}, |
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booktitle={Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics}, |
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year={2020} |
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} |
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``` |
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