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Unverified Commit d155b38d authored by Sylvain Gugger's avatar Sylvain Gugger Committed by GitHub
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Funnel transformer (#6908) 



* Initial model

* Fix upsampling

* Add special cls token id and test

* Formatting

* Test and fist FunnelTokenizerFast

* Common tests

* Fix the check_repo script and document Funnel

* Doc fixes

* Add all models

* Write doc

* Fix test

* Initial model

* Fix upsampling

* Add special cls token id and test

* Formatting

* Test and fist FunnelTokenizerFast

* Common tests

* Fix the check_repo script and document Funnel

* Doc fixes

* Add all models

* Write doc

* Fix test

* Fix copyright

* Forgot some layers can be repeated

* Apply suggestions from code review
Co-authored-by: default avatarLysandre Debut <lysandre@huggingface.co>
Co-authored-by: default avatarPatrick von Platen <patrick.v.platen@gmail.com>

* Update src/transformers/modeling_funnel.py
Co-authored-by: default avatarLysandre Debut <lysandre@huggingface.co>

* Address review comments

* Update src/transformers/modeling_funnel.py

Co-authored-by: Patrick von Platen <patrick.v.platen...
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README.md
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......@@ -173,8 +173,9 @@ Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, and Wen-tau Yih.
23. **[Pegasus](https://github.com/google-research/pegasus)** (from Google) released with the paper [PEGASUS: Pre-training with Extracted Gap-sentences for Abstractive Summarization](https://arxiv.org/abs/1912.08777)> by Jingqing Zhang, Yao Zhao, Mohammad Saleh and Peter J. Liu.
24. **[MBart](https://github.com/pytorch/fairseq/tree/master/examples/mbart)** (from Facebook) released with the paper [Multilingual Denoising Pre-training for Neural Machine Translation](https://arxiv.org/abs/2001.08210) by Yinhan Liu, Jiatao Gu, Naman Goyal, Xian Li, Sergey Edunov, Marjan Ghazvininejad, Mike Lewis, Luke Zettlemoyer.
25. **[LXMERT](https://github.com/airsplay/lxmert)** (from UNC Chapel Hill) released with the paper [LXMERT: Learning Cross-Modality Encoder Representations from Transformers for Open-Domain Question Answering](https://arxiv.org/abs/1908.07490) by Hao Tan and Mohit Bansal.
26. **[Other community models](https://huggingface.co/models)**, contributed by the [community](https://huggingface.co/users).
27. Want to contribute a new model? We have added a **detailed guide and templates** to guide you in the process of adding a new model. You can find them in the [`templates`](./templates) folder of the repository. Be sure to check the [contributing guidelines](./CONTRIBUTING.md) and contact the maintainers or open an issue to collect feedbacks before starting your PR.
26. **[Funnel Transformer](https://github.com/laiguokun/Funnel-Transformer)** (from CMU/Google Brain) released with the paper [Funnel-Transformer: Filtering out Sequential Redundancy for Efficient Language Processing](https://arxiv.org/abs/2006.03236) by Zihang Dai, Guokun Lai, Yiming Yang, Quoc V. Le.
27. **[Other community models](https://huggingface.co/models)**, contributed by the [community](https://huggingface.co/users).
28. Want to contribute a new model? We have added a **detailed guide and templates** to guide you in the process of adding a new model. You can find them in the [`templates`](./templates) folder of the repository. Be sure to check the [contributing guidelines](./CONTRIBUTING.md) and contact the maintainers or open an issue to collect feedbacks before starting your PR.
These implementations have been tested on several datasets (see the example scripts) and should match the performances of the original implementations (e.g. ~93 F1 on SQuAD for BERT Whole-Word-Masking, ~88 F1 on RocStories for OpenAI GPT, ~18.3 perplexity on WikiText 103 for Transformer-XL, ~0.916 Pearson R coefficient on STS-B for XLNet). You can find more details on the performances in the Examples section of the [documentation](https://huggingface.co/transformers/examples.html).
......
docs/source/index.rst
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......@@ -131,7 +131,10 @@ conversion utilities for the following models:
25. `LXMERT <https://github.com/airsplay/lxmert>`_ (from UNC Chapel Hill) released with the paper `LXMERT: Learning
Cross-Modality Encoder Representations from Transformers for Open-Domain Question
Answering <https://arxiv.org/abs/1908.07490>`_ by Hao Tan and Mohit Bansal.
26. `Other community models <https://huggingface.co/models>`_, contributed by the `community
26. `Funnel Transformer <https://github.com/laiguokun/Funnel-Transformer>`_ (from CMU/Google Brain) released with the paper
`Funnel-Transformer: Filtering out Sequential Redundancy for Efficient Language Processing
<https://arxiv.org/abs/2006.03236>`_ by Zihang Dai, Guokun Lai, Yiming Yang, Quoc V. Le.
27. `Other community models <https://huggingface.co/models>`_, contributed by the `community
<https://huggingface.co/users>`_.
.. toctree::
......@@ -216,6 +219,7 @@ conversion utilities for the following models:
model_doc/dpr
model_doc/pegasus
model_doc/mbart
model_doc/funnel
model_doc/lxmert
internal/modeling_utils
internal/tokenization_utils
......
docs/source/model_doc/funnel.rst 0 → 100644
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Funnel Transformer
------------------
Overview
~~~~~~~~~~~~~~~~~~~~~
The Funnel Transformer model was proposed in the paper
`Funnel-Transformer: Filtering out Sequential Redundancy for Efficient Language Processing
<https://arxiv.org/abs/2006.03236>`__.
It is a bidirectional transformer model, like BERT, but with a pooling operation after each block of layers, a bit
like in traditional convolutional neural networks (CNN) in computer vision.
The abstract from the paper is the following:
*With the success of language pretraining, it is highly desirable to develop more efficient architectures of good
scalability that can exploit the abundant unlabeled data at a lower cost. To improve the efficiency, we examine the
much-overlooked redundancy in maintaining a full-length token-level presentation, especially for tasks that only
require a single-vector presentation of the sequence. With this intuition, we propose Funnel-Transformer which
gradually compresses the sequence of hidden states to a shorter one and hence reduces the computation cost. More
importantly, by re-investing the saved FLOPs from length reduction in constructing a deeper or wider model, we further
improve the model capacity. In addition, to perform token-level predictions as required by common pretraining
objectives, Funnel-Transformer is able to recover a deep representation for each token from the reduced hidden sequence
via a decoder. Empirically, with comparable or fewer FLOPs, Funnel-Transformer outperforms the standard Transformer on
a wide variety of sequence-level prediction tasks, including text classification, language understanding, and reading
comprehension.*
Tips:
- Since Funnel Transformer uses pooling, the sequence length of the hidden states changes after each block of layers.
The base model therefore has a final sequence length that is a quarter of the original one. This model can be used
directly for tasks that just require a sentence summary (like sequence classification or multiple choice). For other
tasks, the full model is used; this full model has a decoder that upsamples the final hidden states to the same
sequence length as the input.
- The Funnel Transformer checkpoints are all available with a full version and a base version. The first ones should
be used for :class:`~transformers.FunnelModel`, :class:`~transformers.FunnelForPreTraining`,
:class:`~transformers.FunnelForMaskedLM`, :class:`~transformers.FunnelForTokenClassification` and
class:`~transformers.FunnelForQuestionAnswering`. The second ones should be used for
:class:`~transformers.FunnelBaseModel`, :class:`~transformers.FunnelForSequenceClassification` and
:class:`~transformers.FunnelForMultipleChoice`.
The original code can be found `here <https://github.com/laiguokun/Funnel-Transformer>`_.
FunnelConfig
~~~~~~~~~~~~
.. autoclass:: transformers.FunnelConfig
:members:
FunnelTokenizer
~~~~~~~~~~~~~~~
.. autoclass:: transformers.FunnelTokenizer
:members: build_inputs_with_special_tokens, get_special_tokens_mask,
create_token_type_ids_from_sequences, save_vocabulary
FunnelTokenizerFast
~~~~~~~~~~~~~~~~~~~
.. autoclass:: transformers.FunnelTokenizerFast
:members:
Funnel specific outputs
~~~~~~~~~~~~~~~~~~~~~~~
.. autoclass:: transformers.modeling_funnel.FunnelForPreTrainingOutput
:members:
FunnelBaseModel
~~~~~~~~~~~~~~~
.. autoclass:: transformers.FunnelBaseModel
:members:
FunnelModel
~~~~~~~~~~~
.. autoclass:: transformers.FunnelModel
:members:
FunnelModelForPreTraining
~~~~~~~~~~~~~~~~~~~~~~~~~
.. autoclass:: transformers.FunnelForPreTraining
:members:
FunnelForMaskedLM
~~~~~~~~~~~~~~~~~
.. autoclass:: transformers.FunnelForMaskedLM
:members:
FunnelForSequenceClassification
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. autoclass:: transformers.FunnelForSequenceClassification
:members:
FunnelForMultipleChoice
~~~~~~~~~~~~~~~~~~~~~~~
.. autoclass:: transformers.FunnelForMultipleChoice
:members:
FunnelForTokenClassification
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. autoclass:: transformers.FunnelForTokenClassification
:members:
FunnelForQuestionAnswering
~~~~~~~~~~~~~~~~~~~~~~~~~~
.. autoclass:: transformers.FunnelForQuestionAnswering
:members:
docs/source/model_summary.rst
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......@@ -416,6 +416,38 @@ traditional GAN setting) then the ELECTRA model is trained for a few steps.
The library provides a version of the model for masked language modeling, token classification and sentence
classification.
Funnel Transformer
----------------------------------------------
.. raw:: html
<a href="https://huggingface.co/models?filter=funnel">
<img alt="Models" src="https://img.shields.io/badge/All_model_pages-funnel-blueviolet">
</a>
<a href="model_doc/funnel.html">
<img alt="Doc" src="https://img.shields.io/badge/Model_documentation-funnel-blueviolet">
</a>
`Funnel-Transformer: Filtering out Sequential Redundancy for Efficient Language Processing
<https://arxiv.org/abs/2006.03236>`_, Zihang Dai et al.
Funnel Transformer is a transformer model using pooling, a bit like a ResNet model: layers are grouped in blocks, and
at the beginning of each block (except the first one), the hidden states are pooled among the sequence dimension. This
way, their length is divided by 2, which speeds up the computation of the next hidden states. All pretrained models
have three blocks, which means the final hidden state has a sequence length that is one fourth of the original sequence
length.
For tasks such as classification, this is not a problem, but for tasks like masked language modeling or token
classification, we need a hidden state with the same sequence length as the original input. In those cases, the final
hidden states are upsampled to the input sequence length and go through two additional layers. That's why there are two
versions of each checkpoint. The version suffixed with "-base" contains only the three blocks, while the version
without that suffix contains the three blocks and the upsampling head with its additional layers.
The pretrained models available use the same pretraining objective as ELECTRA.
The library provides a version of the model for masked language modeling, token classification, sentence
classification, multiple choice classification and question answering.
.. _longformer:
Longformer
......
docs/source/pretrained_models.rst
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......@@ -5,9 +5,9 @@ Here is the full list of the currently provided pretrained models together with
For a list that includes community-uploaded models, refer to `https://huggingface.co/models <https://huggingface.co/models>`__.
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| Architecture | Shortcut name | Details of the model |
+===================+============================================================+=======================================================================================================================================+
+====================+============================================================+=======================================================================================================================================+
| BERT | ``bert-base-uncased`` | | 12-layer, 768-hidden, 12-heads, 110M parameters. |
| | | | Trained on lower-cased English text. |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
......@@ -111,10 +111,10 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| | | | Trained on cased Dutch text. |
| | | |
| | | (see `details on wietsedv repository <https://github.com/wietsedv/bertje/>`__). |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| GPT | ``openai-gpt`` | | 12-layer, 768-hidden, 12-heads, 110M parameters. |
| | | | OpenAI GPT English model |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| GPT-2 | ``gpt2`` | | 12-layer, 768-hidden, 12-heads, 117M parameters. |
| | | | OpenAI GPT-2 English model |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
......@@ -126,16 +126,16 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``gpt2-xl`` | | 48-layer, 1600-hidden, 25-heads, 1558M parameters. |
| | | | OpenAI's XL-sized GPT-2 English model |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| Transformer-XL | ``transfo-xl-wt103`` | | 18-layer, 1024-hidden, 16-heads, 257M parameters. |
| | | | English model trained on wikitext-103 |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| XLNet | ``xlnet-base-cased`` | | 12-layer, 768-hidden, 12-heads, 110M parameters. |
| | | | XLNet English model |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``xlnet-large-cased`` | | 24-layer, 1024-hidden, 16-heads, 340M parameters. |
| | | | XLNet Large English model |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| XLM | ``xlm-mlm-en-2048`` | | 12-layer, 2048-hidden, 16-heads |
| | | | XLM English model |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
......@@ -165,7 +165,7 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``xlm-mlm-100-1280`` | | 16-layer, 1280-hidden, 16-heads |
| | | | XLM model trained with MLM (Masked Language Modeling) on 100 languages. |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| RoBERTa | ``roberta-base`` | | 12-layer, 768-hidden, 12-heads, 125M parameters |
| | | | RoBERTa using the BERT-base architecture |
| | | |
......@@ -195,7 +195,7 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| | | | ``roberta-large`` fine-tuned by OpenAI on the outputs of the 1.5B-parameter GPT-2 model. |
| | | |
| | | (see `details <https://github.com/openai/gpt-2-output-dataset/tree/master/detector>`__) |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| DistilBERT | ``distilbert-base-uncased`` | | 6-layer, 768-hidden, 12-heads, 66M parameters |
| | | | The DistilBERT model distilled from the BERT model `bert-base-uncased` checkpoint |
| | | |
......@@ -230,15 +230,15 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| | | | The multilingual DistilBERT model distilled from the Multilingual BERT model `bert-base-multilingual-cased` checkpoint. |
| | | |
| | | (see `details <https://github.com/huggingface/transformers/tree/master/examples/distillation>`__) |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| CTRL | ``ctrl`` | | 48-layer, 1280-hidden, 16-heads, 1.6B parameters |
| | | | Salesforce's Large-sized CTRL English model |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| CamemBERT | ``camembert-base`` | | 12-layer, 768-hidden, 12-heads, 110M parameters |
| | | | CamemBERT using the BERT-base architecture |
| | | |
| | | (see `details <https://github.com/pytorch/fairseq/tree/master/examples/camembert>`__) |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| ALBERT | ``albert-base-v1`` | | 12 repeating layers, 128 embedding, 768-hidden, 12-heads, 11M parameters |
| | | | ALBERT base model |
| | | |
......@@ -278,7 +278,7 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| | | | ALBERT xxlarge model with no dropout, additional training data and longer training |
| | | |
| | | (see `details <https://github.com/google-research/ALBERT>`__) |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| T5 | ``t5-small`` | | ~60M parameters with 6-layers, 512-hidden-state, 2048 feed-forward hidden-state, 8-heads, |
| | | | Trained on English text: the Colossal Clean Crawled Corpus (C4) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
......@@ -293,13 +293,13 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``t5-11B`` | | ~11B parameters with 24-layers, 1024-hidden-state, 65536 feed-forward hidden-state, 128-heads, |
| | | | Trained on English text: the Colossal Clean Crawled Corpus (C4) |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| XLM-RoBERTa | ``xlm-roberta-base`` | | ~125M parameters with 12-layers, 768-hidden-state, 3072 feed-forward hidden-state, 8-heads, |
| | | | Trained on on 2.5 TB of newly created clean CommonCrawl data in 100 languages |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``xlm-roberta-large`` | | ~355M parameters with 24-layers, 1027-hidden-state, 4096 feed-forward hidden-state, 16-heads, |
| | | | Trained on 2.5 TB of newly created clean CommonCrawl data in 100 languages |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| FlauBERT | ``flaubert/flaubert_small_cased`` | | 6-layer, 512-hidden, 8-heads, 54M parameters |
| | | | FlauBERT small architecture |
| | | |
......@@ -319,7 +319,7 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| | | | FlauBERT large architecture |
| | | |
| | | (see `details <https://github.com/getalp/Flaubert>`__) |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| Bart | ``facebook/bart-large`` | | 24-layer, 1024-hidden, 16-heads, 406M parameters |
| | | |
| | | (see `details <https://github.com/pytorch/fairseq/tree/master/examples/bart>`_) |
......@@ -331,7 +331,7 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``facebook/bart-large-cnn`` | | 12-layer, 1024-hidden, 16-heads, 406M parameters (same as base) |
| | | | bart-large base architecture finetuned on cnn summarization task |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| DialoGPT | ``DialoGPT-small`` | | 12-layer, 768-hidden, 12-heads, 124M parameters |
| | | | Trained on English text: 147M conversation-like exchanges extracted from Reddit. |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
......@@ -340,31 +340,71 @@ For a list that includes community-uploaded models, refer to `https://huggingfac
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``DialoGPT-large`` | | 36-layer, 1280-hidden, 20-heads, 774M parameters |
| | | | Trained on English text: 147M conversation-like exchanges extracted from Reddit. |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| Reformer | ``reformer-enwik8`` | | 12-layer, 1024-hidden, 8-heads, 149M parameters |
| | | | Trained on English Wikipedia data - enwik8. |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``reformer-crime-and-punishment`` | | 6-layer, 256-hidden, 2-heads, 3M parameters |
| | | | Trained on English text: Crime and Punishment novel by Fyodor Dostoyevsky. |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| MarianMT | ``Helsinki-NLP/opus-mt-{src}-{tgt}`` | | 12-layer, 512-hidden, 8-heads, ~74M parameter Machine translation models. Parameter counts vary depending on vocab size. |
| | | | (see `model list <https://huggingface.co/Helsinki-NLP>`_) |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| Pegasus | ``google/pegasus-{dataset}`` | | 16-layer, 1024-hidden, 16-heads, ~568M parameter, 2.2 GB for summary. `model list <https://huggingface.co/models?search=pegasus>`__ |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| Longformer | ``allenai/longformer-base-4096`` | | 12-layer, 768-hidden, 12-heads, ~149M parameters |
| | | | Starting from RoBERTa-base checkpoint, trained on documents of max length 4,096 |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``allenai/longformer-large-4096`` | | 24-layer, 1024-hidden, 16-heads, ~435M parameters |
| | | | Starting from RoBERTa-large checkpoint, trained on documents of max length 4,096 |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| MBart | ``facebook/mbart-large-cc25`` | | 24-layer, 1024-hidden, 16-heads, 610M parameters |
| | | | mBART (bart-large architecture) model trained on 25 languages' monolingual corpus |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``facebook/mbart-large-en-ro`` | | 24-layer, 1024-hidden, 16-heads, 610M parameters |
| | | | mbart-large-cc25 model finetuned on WMT english romanian translation. |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| Lxmert | ``lxmert-base-uncased`` | | 9-language layers, 9-relationship layers, and 12-cross-modality layers |
| | | | 768-hidden, 12-heads (for each layer) ~ 228M parameters |
| | | | Starting from lxmert-base checkpoint, trained on over 9 million image-text couplets from COCO, VisualGenome, GQA, VQA |
+-------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| Funnel Transformer | ``funnel-transformer/small`` | | 14 layers: 3 blocks of 4 layers then 2 layers decoder, 768-hidden, 12-heads, 130M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``funnel-transformer/small-base`` | | 12 layers: 3 blocks of 4 layers (no decoder), 768-hidden, 12-heads, 115M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``funnel-transformer/medium`` | | 14 layers: 3 blocks 6, 3x2, 3x2 layers then 2 layers decoder, 768-hidden, 12-heads, 130M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``funnel-transformer/medium-base`` | | 12 layers: 3 blocks 6, 3x2, 3x2 layers(no decoder), 768-hidden, 12-heads, 115M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``funnel-transformer/intermediate`` | | 20 layers: 3 blocks of 6 layers then 2 layers decoder, 768-hidden, 12-heads, 177M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``funnel-transformer/intermediate-base`` | | 18 layers: 3 blocks of 6 layers (no decoder), 768-hidden, 12-heads, 161M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``funnel-transformer/large`` | | 26 layers: 3 blocks of 8 layers then 2 layers decoder, 1024-hidden, 12-heads, 386M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``funnel-transformer/large-base`` | | 24 layers: 3 blocks of 8 layers (no decoder), 1024-hidden, 12-heads, 358M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``funnel-transformer/xlarge`` | | 32 layers: 3 blocks of 10 layers then 2 layers decoder, 1024-hidden, 12-heads, 468M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
| +------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
| | ``funnel-transformer/xlarge-base`` | | 30 layers: 3 blocks of 10 layers (no decoder), 1024-hidden, 12-heads, 440M parameters |
| | | |
| | | (see `details <https://github.com/laiguokun/Funnel-Transformer>`__) |
+--------------------+------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------------------------+
src/transformers/__init__.py
View file @ d155b38d
......@@ -29,6 +29,7 @@ from .configuration_dpr import DPR_PRETRAINED_CONFIG_ARCHIVE_MAP, DPRConfig
from .configuration_electra import ELECTRA_PRETRAINED_CONFIG_ARCHIVE_MAP, ElectraConfig
from .configuration_encoder_decoder import EncoderDecoderConfig
from .configuration_flaubert import FLAUBERT_PRETRAINED_CONFIG_ARCHIVE_MAP, FlaubertConfig
from .configuration_funnel import FUNNEL_PRETRAINED_CONFIG_ARCHIVE_MAP, FunnelConfig
from .configuration_gpt2 import GPT2_PRETRAINED_CONFIG_ARCHIVE_MAP, GPT2Config
from .configuration_longformer import LONGFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP, LongformerConfig
from .configuration_lxmert import LXMERT_PRETRAINED_CONFIG_ARCHIVE_MAP, LxmertConfig
......@@ -155,6 +156,7 @@ from .tokenization_dpr import (
)
from .tokenization_electra import ElectraTokenizer, ElectraTokenizerFast
from .tokenization_flaubert import FlaubertTokenizer
from .tokenization_funnel import FunnelTokenizer, FunnelTokenizerFast
from .tokenization_gpt2 import GPT2Tokenizer, GPT2TokenizerFast
from .tokenization_longformer import LongformerTokenizer, LongformerTokenizerFast
from .tokenization_lxmert import LxmertTokenizer, LxmertTokenizerFast
......@@ -327,6 +329,18 @@ if is_torch_available():
FlaubertModel,
FlaubertWithLMHeadModel,
)
from .modeling_funnel import (
FUNNEL_PRETRAINED_MODEL_ARCHIVE_LIST,
FunnelBaseModel,
FunnelForMaskedLM,
FunnelForMultipleChoice,
FunnelForPreTraining,
FunnelForQuestionAnswering,
FunnelForSequenceClassification,
FunnelForTokenClassification,
FunnelModel,
load_tf_weights_in_funnel,
)
from .modeling_gpt2 import (
GPT2_PRETRAINED_MODEL_ARCHIVE_LIST,
GPT2DoubleHeadsModel,
......
src/transformers/commands/convert.py
View file @ d155b38d
......@@ -15,6 +15,12 @@ def convert_command_factory(args: Namespace):
)
IMPORT_ERROR_MESSAGE = """transformers can only be used from the commandline to convert TensorFlow models in PyTorch,
In that case, it requires TensorFlow to be installed. Please see
https://www.tensorflow.org/install/ for installation instructions.
"""
class ConvertCommand(BaseTransformersCLICommand):
@staticmethod
def register_subcommand(parser: ArgumentParser):
......@@ -69,12 +75,7 @@ class ConvertCommand(BaseTransformersCLICommand):
convert_tf_checkpoint_to_pytorch,
)
except ImportError:
msg = (
"transformers can only be used from the commandline to convert TensorFlow models in PyTorch, "
"In that case, it requires TensorFlow to be installed. Please see "
"https://www.tensorflow.org/install/ for installation instructions."
)
raise ImportError(msg)
raise ImportError(IMPORT_ERROR_MESSAGE)
convert_tf_checkpoint_to_pytorch(self._tf_checkpoint, self._config, self._pytorch_dump_output)
elif self._model_type == "bert":
......@@ -83,12 +84,16 @@ class ConvertCommand(BaseTransformersCLICommand):
convert_tf_checkpoint_to_pytorch,
)
except ImportError:
msg = (
"transformers can only be used from the commandline to convert TensorFlow models in PyTorch, "
"In that case, it requires TensorFlow to be installed. Please see "
"https://www.tensorflow.org/install/ for installation instructions."
raise ImportError(IMPORT_ERROR_MESSAGE)
convert_tf_checkpoint_to_pytorch(self._tf_checkpoint, self._config, self._pytorch_dump_output)
elif self._model_type == "funnel":
try:
from transformers.convert_funnel_original_tf_checkpoint_to_pytorch import (
convert_tf_checkpoint_to_pytorch,
)
raise ImportError(msg)
except ImportError:
raise ImportError(IMPORT_ERROR_MESSAGE)
convert_tf_checkpoint_to_pytorch(self._tf_checkpoint, self._config, self._pytorch_dump_output)
elif self._model_type == "gpt":
......@@ -103,12 +108,7 @@ class ConvertCommand(BaseTransformersCLICommand):
convert_transfo_xl_checkpoint_to_pytorch,
)
except ImportError:
msg = (
"transformers can only be used from the commandline to convert TensorFlow models in PyTorch, "
"In that case, it requires TensorFlow to be installed. Please see "
"https://www.tensorflow.org/install/ for installation instructions."
)
raise ImportError(msg)
raise ImportError(IMPORT_ERROR_MESSAGE)
if "ckpt" in self._tf_checkpoint.lower():
TF_CHECKPOINT = self._tf_checkpoint
......@@ -125,12 +125,7 @@ class ConvertCommand(BaseTransformersCLICommand):
convert_gpt2_checkpoint_to_pytorch,
)
except ImportError:
msg = (
"transformers can only be used from the commandline to convert TensorFlow models in PyTorch, "
"In that case, it requires TensorFlow to be installed. Please see "
"https://www.tensorflow.org/install/ for installation instructions."
)
raise ImportError(msg)
raise ImportError(IMPORT_ERROR_MESSAGE)
convert_gpt2_checkpoint_to_pytorch(self._tf_checkpoint, self._config, self._pytorch_dump_output)
elif self._model_type == "xlnet":
......@@ -139,12 +134,7 @@ class ConvertCommand(BaseTransformersCLICommand):
convert_xlnet_checkpoint_to_pytorch,
)
except ImportError:
msg = (
"transformers can only be used from the commandline to convert TensorFlow models in PyTorch, "
"In that case, it requires TensorFlow to be installed. Please see "
"https://www.tensorflow.org/install/ for installation instructions."
)
raise ImportError(msg)
raise ImportError(IMPORT_ERROR_MESSAGE)
convert_xlnet_checkpoint_to_pytorch(
self._tf_checkpoint, self._config, self._pytorch_dump_output, self._finetuning_task_name
......
src/transformers/configuration_auto.py
View file @ d155b38d
......@@ -26,6 +26,7 @@ from .configuration_distilbert import DISTILBERT_PRETRAINED_CONFIG_ARCHIVE_MAP,
from .configuration_electra import ELECTRA_PRETRAINED_CONFIG_ARCHIVE_MAP, ElectraConfig
from .configuration_encoder_decoder import EncoderDecoderConfig
from .configuration_flaubert import FLAUBERT_PRETRAINED_CONFIG_ARCHIVE_MAP, FlaubertConfig
from .configuration_funnel import FUNNEL_PRETRAINED_CONFIG_ARCHIVE_MAP, FunnelConfig
from .configuration_gpt2 import GPT2_PRETRAINED_CONFIG_ARCHIVE_MAP, GPT2Config
from .configuration_longformer import LONGFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP, LongformerConfig
from .configuration_lxmert import LXMERT_PRETRAINED_CONFIG_ARCHIVE_MAP, LxmertConfig
......@@ -67,6 +68,7 @@ ALL_PRETRAINED_CONFIG_ARCHIVE_MAP = dict(
ELECTRA_PRETRAINED_CONFIG_ARCHIVE_MAP,
LONGFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP,
RETRIBERT_PRETRAINED_CONFIG_ARCHIVE_MAP,
FUNNEL_PRETRAINED_CONFIG_ARCHIVE_MAP,
LXMERT_PRETRAINED_CONFIG_ARCHIVE_MAP,
]
for key, value, in pretrained_map.items()
......@@ -168,6 +170,10 @@ CONFIG_MAPPING = OrderedDict(
"encoder-decoder",
EncoderDecoderConfig,
),
(
"funnel",
FunnelConfig,
),
(
"lxmert",
LxmertConfig,
......@@ -230,6 +236,7 @@ class AutoConfig:
- `ctrl` : :class:`~transformers.CTRLConfig` (CTRL model)
- `flaubert` : :class:`~transformers.FlaubertConfig` (Flaubert model)
- `electra` : :class:`~transformers.ElectraConfig` (ELECTRA model)
- `funnel`: :class:`~transformers.FunnelConfig` (Funnel Transformer model)
Args:
pretrained_model_name_or_path (:obj:`string`):
......
src/transformers/configuration_funnel.py 0 → 100644
View file @ d155b38d
# coding=utf-8
# Copyright 2020, Hugging Face
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" Funnel Transformer model configuration """
from .configuration_utils import PretrainedConfig
from .utils import logging
logger = logging.get_logger(__name__)
FUNNEL_PRETRAINED_CONFIG_ARCHIVE_MAP = {
"funnel-transformer/small": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/small/config.json",
"funnel-transformer/small-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/small-base/config.json",
"funnel-transformer/medium": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/medium/config.json",
"funnel-transformer/medium-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/medium-base/config.json",
"funnel-transformer/intermediate": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/intermediate/config.json",
"funnel-transformer/intermediate-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/intermediate-base/config.json",
"funnel-transformer/large": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/large/config.json",
"funnel-transformer/large-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/large-base/config.json",
"funnel-transformer/xlarge": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/xlarge/config.json",
"funnel-transformer/xlarge-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/xlarge-base/config.json",
}
class FunnelConfig(PretrainedConfig):
r"""
This is the configuration class to store the configuration of a :class:`~transformers.FunnelModel`.
It is used to instantiate an Funnel Transformer model according to the specified arguments, defining the model
architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of
the Funnel Transformer `funnel-transformer/small <https://huggingface.co/funnel-transformer/small>`__ architecture.
Configuration objects inherit from :class:`~transformers.PretrainedConfig` and can be used
to control the model outputs. Read the documentation from :class:`~transformers.PretrainedConfig`
for more information.
Args:
vocab_size (:obj:`int`, `optional`, defaults to 30522):
Vocabulary size of the Funnel transformer. Defines the different tokens that
can be represented by the `inputs_ids` passed to the forward method of :class:`~transformers.FunnelModel`.
block_sizes (:obj:`List[int]`, `optional`, defaults to :obj:`[4, 4, 4]`):
The sizes of the blocks used in the model.
block_repeats (:obj:`List[int]`, `optional`):
If passed along, each layer of each block is repeated the number of times indicated.
num_decoder_layers (:obj:`int`, `optional`, defaults to 2):
The number of layers in the decoder (when not using the base model).
d_model (:obj:`int`, `optional`, defaults to 768):
Dimensionality of the model's hidden states.
n_head (:obj:`int`, `optional`, defaults to 12):
Number of attention heads for each attention layer in the Transformer encoder.
d_head (:obj:`int`, `optional`, defaults to 64):
Dimensionality of the model's heads.
d_inner (:obj:`int`, `optional`, defaults to 3072):
Inner dimension in the feed-forward blocks.
hidden_act (:obj:`str` or :obj:`callable`, `optional`, defaults to :obj:`"gelu_new"`):
The non-linear activation function (function or string) in the encoder and pooler.
If string, :obj:`"gelu"`, :obj:`"relu"`, :obj:`"swish"` and :obj:`"gelu_new"` are supported.
hidden_dropout (:obj:`float`, `optional`, defaults to 0.1):
The dropout probabilitiy for all fully connected layers in the embeddings, encoder, and pooler.
attention_dropout (:obj:`float`, `optional`, defaults to 0.1):
The dropout probability for the attention probabilities.
activation_dropout (:obj:`float`, `optional`, defaults to 0.0):
The dropout probability used between the two layers of the feed-forward blocks.
max_position_embeddings (:obj:`int`, `optional`, defaults to 512):
The maximum sequence length that this model might ever be used with.
Typically set this to something large just in case (e.g., 512 or 1024 or 2048).
type_vocab_size (:obj:`int`, `optional`, defaults to 3):
The vocabulary size of the `token_type_ids` passed into :class:`~transformers.FunnelModel`.
initializer_range (:obj:`float`, `optional`, defaults to 0.1):
The standard deviation of the `uniform initializer` for initializing all weight matrices in attention
layers.
initializer_std (:obj:`float`, `optional`):
The standard deviation of the `normal initializer` for initializing the embedding matrix and the weight of
linear layers. Will default to 1 for the embedding matrix and the value given by Xavier initialization for
linear layers.
layer_norm_eps (:obj:`float`, `optional`, defaults to 1e-9):
The epsilon used by the layer normalization layers.
pooling_type (:obj:`str`, `optional`, defaults to :obj:`"mean"`):
Possible values are ``"mean"`` or ``"max"``. The way pooling is performed at the beginning of each
block.
attention_type (:obj:`str`, `optional`, defaults to :obj:`"relative_shift"`):
Possible values are ``"relative_shift"`` or ``"factorized"``. The former is faster on CPU/GPU while
the latter is faster on TPU.
separate_cls (:obj:`bool`, `optional`, defaults to :obj:`True`):
Whether or not to separate the cls token when applying pooling.
truncate_seq (:obj:`bool`, `optional`, defaults to :obj:`False`):
When using ``separate_cls``, whether or not to truncate the last token when pooling, to avoid getting
a sequence length that is not a multiple of 2.
pool_q_only (:obj:`bool`, `optional`, defaults to :obj:`False`):
Whether or not to apply the pooling only to the query or to query, key and values for the attention
layers.
"""
model_type = "funnel"
def __init__(
self,
vocab_size=30522,
block_sizes=[4, 4, 4],
block_repeats=None,
num_decoder_layers=2,
d_model=768,
n_head=12,
d_head=64,
d_inner=3072,
hidden_act="gelu_new",
hidden_dropout=0.1,
attention_dropout=0.1,
activation_dropout=0.0,
max_position_embeddings=512,
type_vocab_size=3,
initializer_range=0.1,
initializer_std=None,
layer_norm_eps=1e-9,
pooling_type="mean",
attention_type="relative_shift",
separate_cls=True,
truncate_seq=True,
pool_q_only=True,
**kwargs
):
super().__init__(**kwargs)
self.vocab_size = vocab_size
self.block_sizes = block_sizes
self.block_repeats = [1] * len(block_sizes) if block_repeats is None else block_repeats
assert len(block_sizes) == len(
self.block_repeats
), "`block_sizes` and `block_repeats` should have the same length."
self.num_decoder_layers = num_decoder_layers
self.d_model = d_model
self.n_head = n_head
self.d_head = d_head
self.d_inner = d_inner
self.hidden_act = hidden_act
self.hidden_dropout = hidden_dropout
self.attention_dropout = attention_dropout
self.activation_dropout = activation_dropout
self.max_position_embeddings = max_position_embeddings
self.type_vocab_size = type_vocab_size
self.initializer_range = initializer_range
self.initializer_std = initializer_std
self.layer_norm_eps = layer_norm_eps
assert pooling_type in [
"mean",
"max",
], f"Got {pooling_type} for `pooling_type` but only 'mean' and 'max' are supported."
self.pooling_type = pooling_type
assert attention_type in [
"relative_shift",
"factorized",
], f"Got {attention_type} for `attention_type` but only 'relative_shift' and 'factorized' are supported."
self.attention_type = attention_type
self.separate_cls = separate_cls
self.truncate_seq = truncate_seq
self.pool_q_only = pool_q_only
@property
def hidden_size(self):
return self.d_model
@property
def num_attention_heads(self):
return self.n_head
@property
def num_hidden_layers(self):
return sum(self.block_sizes)
@property
def num_blocks(self):
return len(self.block_sizes)
src/transformers/convert_funnel_original_tf_checkpoint_to_pytorch.py 0 → 100755
View file @ d155b38d
# coding=utf-8
# Copyright 2020 The HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Convert Funnel checkpoint."""
import argparse
import logging
import torch
from transformers import FunnelConfig, FunnelForPreTraining, load_tf_weights_in_funnel
logging.basicConfig(level=logging.INFO)
def convert_tf_checkpoint_to_pytorch(tf_checkpoint_path, config_file, pytorch_dump_path):
# Initialise PyTorch model
config = FunnelConfig.from_json_file(config_file)
print("Building PyTorch model from configuration: {}".format(str(config)))
model = FunnelForPreTraining(config)
# Load weights from tf checkpoint
load_tf_weights_in_funnel(model, config, tf_checkpoint_path)
# Save pytorch-model
print("Save PyTorch model to {}".format(pytorch_dump_path))
torch.save(model.state_dict(), pytorch_dump_path)
if __name__ == "__main__":
parser = argparse.ArgumentParser()
# Required parameters
parser.add_argument(
"--tf_checkpoint_path", default=None, type=str, required=True, help="Path to the TensorFlow checkpoint path."
)
parser.add_argument(
"--config_file",
default=None,
type=str,
required=True,
help="The config json file corresponding to the pre-trained model. \n"
"This specifies the model architecture.",
)
parser.add_argument(
"--pytorch_dump_path", default=None, type=str, required=True, help="Path to the output PyTorch model."
)
args = parser.parse_args()
convert_tf_checkpoint_to_pytorch(args.tf_checkpoint_path, args.config_file, args.pytorch_dump_path)
src/transformers/modeling_auto.py
View file @ d155b38d
......@@ -29,6 +29,7 @@ from .configuration_auto import (
ElectraConfig,
EncoderDecoderConfig,
FlaubertConfig,
FunnelConfig,
GPT2Config,
LongformerConfig,
LxmertConfig,
......@@ -108,6 +109,14 @@ from .modeling_flaubert import (
FlaubertModel,
FlaubertWithLMHeadModel,
)
from .modeling_funnel import (
FunnelForMaskedLM,
FunnelForMultipleChoice,
FunnelForQuestionAnswering,
FunnelForSequenceClassification,
FunnelForTokenClassification,
FunnelModel,
)
from .modeling_gpt2 import GPT2LMHeadModel, GPT2Model
from .modeling_longformer import (
LongformerForMaskedLM,
......@@ -202,6 +211,7 @@ MODEL_MAPPING = OrderedDict(
(CTRLConfig, CTRLModel),
(ElectraConfig, ElectraModel),
(ReformerConfig, ReformerModel),
(FunnelConfig, FunnelModel),
(LxmertConfig, LxmertModel),
]
)
......@@ -254,6 +264,7 @@ MODEL_WITH_LM_HEAD_MAPPING = OrderedDict(
(ElectraConfig, ElectraForMaskedLM),
(EncoderDecoderConfig, EncoderDecoderModel),
(ReformerConfig, ReformerModelWithLMHead),
(FunnelConfig, FunnelForMaskedLM),
]
)
......@@ -291,6 +302,7 @@ MODEL_FOR_MASKED_LM_MAPPING = OrderedDict(
(XLMConfig, XLMWithLMHeadModel),
(ElectraConfig, ElectraForMaskedLM),
(ReformerConfig, ReformerForMaskedLM),
(FunnelConfig, FunnelForMaskedLM),
]
)
......@@ -320,6 +332,7 @@ MODEL_FOR_SEQUENCE_CLASSIFICATION_MAPPING = OrderedDict(
(FlaubertConfig, FlaubertForSequenceClassification),
(XLMConfig, XLMForSequenceClassification),
(ElectraConfig, ElectraForSequenceClassification),
(FunnelConfig, FunnelForSequenceClassification),
]
)
......@@ -339,6 +352,7 @@ MODEL_FOR_QUESTION_ANSWERING_MAPPING = OrderedDict(
(XLMConfig, XLMForQuestionAnsweringSimple),
(ElectraConfig, ElectraForQuestionAnswering),
(ReformerConfig, ReformerForQuestionAnswering),
(FunnelConfig, FunnelForQuestionAnswering),
]
)
......@@ -357,6 +371,7 @@ MODEL_FOR_TOKEN_CLASSIFICATION_MAPPING = OrderedDict(
(AlbertConfig, AlbertForTokenClassification),
(ElectraConfig, ElectraForTokenClassification),
(FlaubertConfig, FlaubertForTokenClassification),
(FunnelConfig, FunnelForTokenClassification),
]
)
......@@ -374,6 +389,7 @@ MODEL_FOR_MULTIPLE_CHOICE_MAPPING = OrderedDict(
(AlbertConfig, AlbertForMultipleChoice),
(XLMConfig, XLMForMultipleChoice),
(FlaubertConfig, FlaubertForMultipleChoice),
(FunnelConfig, FunnelForMultipleChoice),
]
)
......@@ -421,6 +437,7 @@ class AutoModel:
- isInstance of `xlm` configuration class: :class:`~transformers.XLMModel` (XLM model)
- isInstance of `flaubert` configuration class: :class:`~transformers.FlaubertModel` (Flaubert model)
- isInstance of `electra` configuration class: :class:`~transformers.ElectraModel` (Electra model)
- isInstance of `funnel` configuration class: :class:`~transformers.FunnelModel` (Funnel Transformer model)
Examples::
......@@ -462,6 +479,7 @@ class AutoModel:
- `ctrl`: :class:`~transformers.CTRLModel` (Salesforce CTRL model)
- `flaubert`: :class:`~transformers.FlaubertModel` (Flaubert model)
- `electra`: :class:`~transformers.ElectraModel` (Electra model)
- `funnel`: :class:`~transformers.FunnelModel` (Funnel Transformer model)
The model is set in evaluation mode by default using `model.eval()` (Dropout modules are deactivated)
To train the model, you should first set it back in training mode with `model.train()`
......@@ -729,6 +747,7 @@ class AutoModelWithLMHead:
- isInstance of `xlm` configuration class: :class:`~transformers.XLMWithLMHeadModel` (XLM model)
- isInstance of `flaubert` configuration class: :class:`~transformers.FlaubertWithLMHeadModel` (Flaubert model)
- isInstance of `electra` configuration class: :class:`~transformers.ElectraForMaskedLM` (Electra model)
- isInstance of `funnel` configuration class: :class:`~transformers.FunnelForMaskedLM` (Funnel Transformer model)
Examples::
......@@ -774,6 +793,7 @@ class AutoModelWithLMHead:
- `ctrl`: :class:`~transformers.CTRLLMHeadModel` (Salesforce CTRL model)
- `flaubert`: :class:`~transformers.FlaubertWithLMHeadModel` (Flaubert model)
- `electra`: :class:`~transformers.ElectraForMaskedLM` (Electra model)
- `funnel`: :class:`~transformers.FunnelForMaskedLM` (Funnel Transformer model)
The model is set in evaluation mode by default using `model.eval()` (Dropout modules are deactivated)
To train the model, you should first set it back in training mode with `model.train()`
......@@ -1024,6 +1044,7 @@ class AutoModelForMaskedLM:
- isInstance of `electra` configuration class: :class:`~transformers.ElectraForMaskedLM` (Electra model)
- isInstance of `camembert` configuration class: :class:`~transformers.CamembertForMaskedLM` (Camembert model)
- isInstance of `albert` configuration class: :class:`~transformers.AlbertForMaskedLM` (Albert model)
- isInstance of `funnel` configuration class: :class:`~transformers.FunnelForMaskedLM` (Funnel Transformer model)
Examples::
......@@ -1060,6 +1081,7 @@ class AutoModelForMaskedLM:
- `flaubert`: :class:`~transformers.FlaubertWithLMHeadModel` (Flaubert model)
- `electra`: :class:`~transformers.ElectraForMaskedLM` (Electra model)
- `bert`: :class:`~transformers.BertLMHeadModel` (Bert model)
- `funnel`: :class:`~transformers.FunnelForMaskedLM` (Funnel Transformer model)
The model is set in evaluation mode by default using `model.eval()` (Dropout modules are deactivated)
To train the model, you should first set it back in training mode with `model.train()`
......@@ -1304,7 +1326,7 @@ class AutoModelForSequenceClassification:
- isInstance of `xlnet` configuration class: :class:`~transformers.XLNetForSequenceClassification` (XLNet model)
- isInstance of `xlm` configuration class: :class:`~transformers.XLMForSequenceClassification` (XLM model)
- isInstance of `flaubert` configuration class: :class:`~transformers.FlaubertForSequenceClassification` (Flaubert model)
- isInstance of `funnel` configuration class: :class:`~transformers.FunnelModelForSequenceClassification` (Funnel Transformer model)
Examples::
......@@ -1340,6 +1362,7 @@ class AutoModelForSequenceClassification:
- `bert`: :class:`~transformers.BertForSequenceClassification` (Bert model)
- `xlnet`: :class:`~transformers.XLNetForSequenceClassification` (XLNet model)
- `flaubert`: :class:`~transformers.FlaubertForSequenceClassification` (Flaubert model)
- `funnel`: :class:`~transformers.FunnelForSequenceClassification` (Funnel Transformer model)
The model is set in evaluation mode by default using `model.eval()` (Dropout modules are deactivated)
To train the model, you should first set it back in training mode with `model.train()`
......@@ -1454,6 +1477,7 @@ class AutoModelForQuestionAnswering:
- isInstance of `xlnet` configuration class: :class:`~transformers.XLNetForQuestionAnswering` (XLNet model)
- isInstance of `xlm` configuration class: :class:`~transformers.XLMForQuestionAnswering` (XLM model)
- isInstance of `flaubert` configuration class: :class:`~transformers.FlaubertForQuestionAnswering` (XLM model)
- isInstance of `funnel` configuration class: :class:`~transformers.FunnelForQuestionAnswering` (Funnel Transformer model)
Examples::
......@@ -1488,6 +1512,7 @@ class AutoModelForQuestionAnswering:
- `xlnet`: :class:`~transformers.XLNetForQuestionAnswering` (XLNet model)
- `xlm`: :class:`~transformers.XLMForQuestionAnswering` (XLM model)
- `flaubert`: :class:`~transformers.FlaubertForQuestionAnswering` (XLM model)
- `funnel`: :class:`~transformers.FunnelForQuestionAnswering` (Funnel Transformer model)
The model is set in evaluation mode by default using `model.eval()` (Dropout modules are deactivated)
To train the model, you should first set it back in training mode with `model.train()`
......@@ -1604,6 +1629,7 @@ class AutoModelForTokenClassification:
- isInstance of `camembert` configuration class: :class:`~transformers.CamembertModelForTokenClassification` (Camembert model)
- isInstance of `roberta` configuration class: :class:`~transformers.RobertaModelForTokenClassification` (Roberta model)
- isInstance of `electra` configuration class: :class:`~transformers.ElectraForTokenClassification` (Electra model)
- isInstance of `funnel` configuration class: :class:`~transformers.FunnelForTokenClassification` (Funnel Transformer model)
Examples::
......@@ -1641,6 +1667,7 @@ class AutoModelForTokenClassification:
- `flaubert`: :class:`~transformers.FlaubertForTokenClassification` (Flaubert model)
- `roberta`: :class:`~transformers.RobertaForTokenClassification` (Roberta model)
- `electra`: :class:`~transformers.ElectraForTokenClassification` (Electra model)
- `funnel`: :class:`~transformers.FunnelForTokenClassification` (Funnel Transformer model)
The model is set in evaluation mode by default using `model.eval()` (Dropout modules are deactivated)
To train the model, you should first set it back in training mode with `model.train()`
......
src/transformers/modeling_funnel.py 0 → 100644
View file @ d155b38d
# coding=utf-8
# Copyright 2020-present Google Brain and Carnegie Mellon University Authors and the HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" PyTorch Funnel Transformer model. """
import os
from dataclasses import dataclass
from typing import Optional, Tuple
import numpy as np
import torch
from torch import nn
from torch.nn import CrossEntropyLoss, MSELoss
from torch.nn import functional as F
from .activations import ACT2FN
from .configuration_funnel import FunnelConfig
from .file_utils import (
ModelOutput,
add_code_sample_docstrings,
add_start_docstrings,
add_start_docstrings_to_callable,
replace_return_docstrings,
)
from .modeling_outputs import (
BaseModelOutput,
MaskedLMOutput,
MultipleChoiceModelOutput,
QuestionAnsweringModelOutput,
SequenceClassifierOutput,
TokenClassifierOutput,
)
from .modeling_utils import PreTrainedModel
from .utils import logging
logger = logging.get_logger(__name__)
_CONFIG_FOR_DOC = "FunnelConfig"
_TOKENIZER_FOR_DOC = "FunnelTokenizer"
FUNNEL_PRETRAINED_MODEL_ARCHIVE_LIST = [
"funnel-transformer/small", # B4-4-4H768
"funnel-transformer/small-base", # B4-4-4H768, no decoder
"funnel-transformer/medium", # B6-3x2-3x2H768
"funnel-transformer/medium-base", # B6-3x2-3x2H768, no decoder
"funnel-transformer/intermediate", # B6-6-6H768
"funnel-transformer/intermediate-base", # B6-6-6H768, no decoder
"funnel-transformer/large", # B8-8-8H1024
"funnel-transformer/large-base", # B8-8-8H1024, no decoder
"funnel-transformer/xlarge-base", # B10-10-10H1024
"funnel-transformer/xlarge", # B10-10-10H1024, no decoder
]
FunnelLayerNorm = nn.LayerNorm
INF = 1e6
def load_tf_weights_in_funnel(model, config, tf_checkpoint_path):
"""Load tf checkpoints in a pytorch model."""
try:
import re
import numpy as np
import tensorflow as tf
except ImportError:
logger.error(
"Loading a TensorFlow model in PyTorch, requires TensorFlow to be installed. Please see "
"https://www.tensorflow.org/install/ for installation instructions."
)
raise
tf_path = os.path.abspath(tf_checkpoint_path)
logger.info("Converting TensorFlow checkpoint from {}".format(tf_path))
# Load weights from TF model
init_vars = tf.train.list_variables(tf_path)
names = []
arrays = []
for name, shape in init_vars:
logger.info("Loading TF weight {} with shape {}".format(name, shape))
array = tf.train.load_variable(tf_path, name)
names.append(name)
arrays.append(array)
_layer_map = {
"k": "k_head",
"q": "q_head",
"v": "v_head",
"o": "post_proj",
"layer_1": "linear_1",
"layer_2": "linear_2",
"rel_attn": "attention",
"ff": "ffn",
"kernel": "weight",
"gamma": "weight",
"beta": "bias",
"lookup_table": "weight",
"word_embedding": "word_embeddings",
"input": "embeddings",
}
for name, array in zip(names, arrays):
name = name.split("/")
# adam_v and adam_m are variables used in AdamWeightDecayOptimizer to calculated m and v
# which are not required for using pretrained model
if any(
n in ["adam_v", "adam_m", "AdamWeightDecayOptimizer", "AdamWeightDecayOptimizer_1", "global_step"]
for n in name
):
logger.info("Skipping {}".format("/".join(name)))
continue
if name[0] == "generator":
continue
pointer = model
skipped = False
for m_name in name[1:]:
if not isinstance(pointer, FunnelPositionwiseFFN) and re.fullmatch(r"layer_\d+", m_name):
layer_index = int(re.search("layer_(\d+)", m_name).groups()[0])
if layer_index < config.num_hidden_layers:
block_idx = 0
while layer_index >= config.block_sizes[block_idx]:
layer_index -= config.block_sizes[block_idx]
block_idx += 1
pointer = pointer.blocks[block_idx][layer_index]
else:
layer_index -= config.num_hidden_layers
pointer = pointer.layers[layer_index]
elif m_name == "r" and isinstance(pointer, FunnelRelMultiheadAttention):
pointer = pointer.r_kernel
break
elif m_name in _layer_map:
pointer = getattr(pointer, _layer_map[m_name])
else:
try:
pointer = getattr(pointer, m_name)
except AttributeError:
print("Skipping {}".format("/".join(name)), array.shape)
skipped = True
break
if not skipped:
if len(pointer.shape) != len(array.shape):
array = array.reshape(pointer.shape)
if m_name == "kernel":
array = np.transpose(array)
pointer.data = torch.from_numpy(array)
return model
class FunnelEmbeddings(nn.Module):
def __init__(self, config):
super().__init__()
self.word_embeddings = nn.Embedding(config.vocab_size, config.hidden_size, padding_idx=config.pad_token_id)
self.layer_norm = FunnelLayerNorm(config.d_model, eps=config.layer_norm_eps)
self.dropout = nn.Dropout(config.hidden_dropout)
def forward(self, input_ids=None, inputs_embeds=None):
if inputs_embeds is None:
inputs_embeds = self.word_embeddings(input_ids)
embeddings = self.layer_norm(inputs_embeds)
embeddings = self.dropout(embeddings)
return embeddings
class FunnelAttentionStructure(nn.Module):
"""
Contains helpers for `FunnelRelMultiheadAttention `.
"""
cls_token_type_id: int = 2
def __init__(self, config):
super().__init__()
self.config = config
self.sin_dropout = nn.Dropout(config.hidden_dropout)
self.cos_dropout = nn.Dropout(config.hidden_dropout)
# Track where we are at in terms of pooling from the original input, e.g., by how much the sequence length was
# dividide.
self.pooling_mult = None
def init_attention_inputs(self, input_embeds, attention_mask=None, token_type_ids=None):
""" Returns the attention inputs associated to the inputs of the model. """
# input_embeds has shape batch_size x seq_len x d_model
# attention_mask and token_type_ids have shape batch_size x seq_len
self.pooling_mult = 1
self.seq_len = seq_len = input_embeds.size(1)
position_embeds = self.get_position_embeds(seq_len, input_embeds.dtype, input_embeds.device)
token_type_mat = self.token_type_ids_to_mat(token_type_ids) if token_type_ids is not None else None
cls_mask = (
F.pad(input_embeds.new_ones([seq_len - 1, seq_len - 1]), (1, 0, 1, 0))
if self.config.separate_cls
else None
)
return (position_embeds, token_type_mat, attention_mask, cls_mask)
def token_type_ids_to_mat(self, token_type_ids):
"""Convert `token_type_ids` to `token_type_mat`."""
token_type_mat = token_type_ids[:, :, None] == token_type_ids[:, None]
# Treat <cls> as in the same segment as both A & B
cls_ids = token_type_ids == self.cls_token_type_id
cls_mat = cls_ids[:, :, None] | cls_ids[:, None]
return cls_mat | token_type_mat
def get_position_embeds(self, seq_len, dtype, device):
"""
Create and cache inputs related to relative position encoding. Those are very different depending on whether we
are using the factorized or the relative shift attention:
For the factorized attention, it returns the matrices (phi, pi, psi, omega) used in the paper, appendix A.2.2,
final formula.
For the relative shif attention, it returns all possible vectors R used in the paper, appendix A.2.1, final
formula.
Paper link: https://arxiv.org/abs/2006.03236
"""
d_model = self.config.d_model
if self.config.attention_type == "factorized":
# Notations from the paper, appending A.2.2, final formula.
# We need to create and return the matrics phi, psi, pi and omega.
pos_seq = torch.arange(0, seq_len, 1.0, dtype=dtype, device=device)
freq_seq = torch.arange(0, d_model // 2, 1.0, dtype=dtype, device=device)
inv_freq = 1 / (10000 ** (freq_seq / (d_model // 2)))
sinusoid = pos_seq[:, None] * inv_freq[None]
sin_embed = torch.sin(sinusoid)
sin_embed_d = self.sin_dropout(sin_embed)
cos_embed = torch.cos(sinusoid)
cos_embed_d = self.cos_dropout(cos_embed)
# This is different from the formula on the paper...
phi = torch.cat([sin_embed_d, sin_embed_d], dim=-1)
psi = torch.cat([cos_embed, sin_embed], dim=-1)
pi = torch.cat([cos_embed_d, cos_embed_d], dim=-1)
omega = torch.cat([-sin_embed, cos_embed], dim=-1)
return (phi, pi, psi, omega)
else:
# Notations from the paper, appending A.2.1, final formula.
# We need to create and return all the possible vectors R for all blocks and shifts.
freq_seq = torch.arange(0, d_model // 2, 1.0, dtype=dtype, device=device)
inv_freq = 1 / (10000 ** (freq_seq / (d_model // 2)))
# Maximum relative positions for the first input
rel_pos_id = torch.arange(-seq_len * 2, seq_len * 2, 1.0, dtype=dtype, device=device)
zero_offset = seq_len * 2
sinusoid = rel_pos_id[:, None] * inv_freq[None]
sin_embed = self.sin_dropout(torch.sin(sinusoid))
cos_embed = self.cos_dropout(torch.cos(sinusoid))
pos_embed = torch.cat([sin_embed, cos_embed], dim=-1)
pos = torch.arange(0, seq_len, dtype=dtype, device=device)
pooled_pos = pos
position_embeds_list = []
for block_index in range(0, self.config.num_blocks):
# For each block with block_index > 0, we need two types position embeddings:
# - Attention(pooled-q, unpooled-kv)
# - Attention(pooled-q, pooled-kv)
# For block_index = 0 we only need the second one and leave the first one as None.
# First type
if block_index == 0:
position_embeds_pooling = None
else:
pooled_pos = self.stride_pool_pos(pos, block_index)
# construct rel_pos_id
stride = 2 ** (block_index - 1)
rel_pos = self.relative_pos(pos, stride, pooled_pos, shift=2)
rel_pos = rel_pos[:, None] + zero_offset
rel_pos = rel_pos.expand(rel_pos.size(0), d_model)
position_embeds_pooling = torch.gather(pos_embed, 0, rel_pos)
# Second type
pos = pooled_pos
stride = 2 ** block_index
rel_pos = self.relative_pos(pos, stride)
rel_pos = rel_pos[:, None] + zero_offset
rel_pos = rel_pos.expand(rel_pos.size(0), d_model)
position_embeds_no_pooling = torch.gather(pos_embed, 0, rel_pos)
position_embeds_list.append([position_embeds_no_pooling, position_embeds_pooling])
return position_embeds_list
def stride_pool_pos(self, pos_id, block_index):
"""
Pool `pos_id` while keeping the cls token separate (if `config.separate_cls=True`).
"""
if self.config.separate_cls:
# Under separate <cls>, we treat the <cls> as the first token in
# the previous block of the 1st real block. Since the 1st real
# block always has position 1, the position of the previous block
# will be at `1 - 2 ** block_index`.
cls_pos = pos_id.new_tensor([-(2 ** block_index) + 1])
pooled_pos_id = pos_id[1:-1] if self.config.truncate_seq else pos_id[1:]
return torch.cat([cls_pos, pooled_pos_id[::2]], 0)
else:
return pos_id[::2]
def relative_pos(self, pos, stride, pooled_pos=None, shift=1):
"""
Build the relative positional vector between `pos` and `pooled_pos`.
"""
if pooled_pos is None:
pooled_pos = pos
ref_point = pooled_pos[0] - pos[0]
num_remove = shift * len(pooled_pos)
max_dist = ref_point + num_remove * stride
min_dist = pooled_pos[0] - pos[-1]
return torch.arange(max_dist, min_dist - 1, -stride, dtype=torch.long, device=pos.device)
def stride_pool(self, tensor, axis):
"""
Perform pooling by stride slicing the tensor along the given axis.
"""
if tensor is None:
return None
# Do the stride pool recursively if axis is a list or a tuple of ints.
if isinstance(axis, (list, tuple)):
for ax in axis:
tensor = self.stride_pool(tensor, ax)
return tensor
# Do the stride pool recursively if tensor is a list or tuple of tensors.
if isinstance(tensor, (tuple, list)):
return type(tensor)(self.stride_pool(x, axis) for x in tensor)
# Deal with negative axis
axis %= tensor.ndim
axis_slice = (
slice(None, -1, 2) if self.config.separate_cls and self.config.truncate_seq else slice(None, None, 2)
)
enc_slice = [slice(None)] * axis + [axis_slice]
if self.config.separate_cls:
cls_slice = [slice(None)] * axis + [slice(None, 1)]
tensor = torch.cat([tensor[cls_slice], tensor], axis=axis)
return tensor[enc_slice]
def pool_tensor(self, tensor, mode="mean", stride=2):
"""Apply 1D pooling to a tensor of size [B x T (x H)]."""
if tensor is None:
return None
# Do the pool recursively if tensor is a list or tuple of tensors.
if isinstance(tensor, (tuple, list)):
return type(tensor)(self.pool_tensor(tensor, mode=mode, stride=stride) for x in tensor)
if self.config.separate_cls:
suffix = tensor[:, :-1] if self.config.truncate_seq else tensor
tensor = torch.cat([tensor[:, :1], suffix], dim=1)
ndim = tensor.ndim
if ndim == 2:
tensor = tensor[:, None, :, None]
elif ndim == 3:
tensor = tensor[:, None, :, :]
# Stride is applied on the second-to-last dimension.
stride = (stride, 1)
tensor = tensor.float()
if mode == "mean":
tensor = F.avg_pool2d(tensor, stride, stride=stride, ceil_mode=True)
elif mode == "max":
tensor = F.max_pool2d(tensor, stride, stride=stride, ceil_mode=True)
elif mode == "min":
tensor = -F.max_pool2d(-tensor, stride, stride=stride, ceil_mode=True)
else:
raise NotImplementedError("The supported modes are 'mean', 'max' and 'min'.")
if ndim == 2:
return tensor[:, 0, :, 0]
elif ndim == 3:
return tensor[:, 0]
return tensor
def pre_attention_pooling(self, output, attention_inputs):
""" Pool `output` and the proper parts of `attention_inputs` before the attention layer. """
position_embeds, token_type_mat, attention_mask, cls_mask = attention_inputs
if self.config.pool_q_only:
if self.config.attention_type == "factorized":
position_embeds = self.stride_pool(position_embeds[:2], 0) + position_embeds[2:]
token_type_mat = self.stride_pool(token_type_mat, 1)
cls_mask = self.stride_pool(cls_mask, 0)
output = self.pool_tensor(output, mode=self.config.pooling_type)
else:
self.pooling_mult *= 2
if self.config.attention_type == "factorized":
position_embeds = self.stride_pool(position_embeds, 0)
token_type_mat = self.stride_pool(token_type_mat, [1, 2])
cls_mask = self.stride_pool(cls_mask, [1, 2])
attention_mask = self.pool_tensor(attention_mask, mode="min")
output = self.pool_tensor(output, mode=self.config.pooling_type)
attention_inputs = (position_embeds, token_type_mat, attention_mask, cls_mask)
return output, attention_inputs
def post_attention_pooling(self, attention_inputs):
""" Pool the proper parts of `attention_inputs` after the attention layer. """
position_embeds, token_type_mat, attention_mask, cls_mask = attention_inputs
if self.config.pool_q_only:
self.pooling_mult *= 2
if self.config.attention_type == "factorized":
position_embeds = position_embeds[:2] + self.stride_pool(position_embeds[2:], 0)
token_type_mat = self.stride_pool(token_type_mat, 2)
cls_mask = self.stride_pool(cls_mask, 1)
attention_mask = self.pool_tensor(attention_mask, mode="min")
attention_inputs = (position_embeds, token_type_mat, attention_mask, cls_mask)
return attention_inputs
def _relative_shift_gather(positional_attn, context_len, shift):
batch_size, n_head, seq_len, max_rel_len = positional_attn.shape
# max_rel_len = 2 * context_len + shift -1 is the numbers of possible relative positions i-j
# What's next is the same as doing the following gather, which might be clearer code but less efficient.
# idxs = context_len + torch.arange(0, context_len).unsqueeze(0) - torch.arange(0, context_len).unsqueeze(1)
# # matrix of context_len + i-j
# return positional_attn.gather(3, idxs.expand([bs, n_head, context_len, context_len]))
positional_attn = torch.reshape(positional_attn, [batch_size, n_head, max_rel_len, seq_len])
positional_attn = positional_attn[:, :, shift:, :]
positional_attn = torch.reshape(positional_attn, [batch_size, n_head, seq_len, max_rel_len - shift])
positional_attn = positional_attn[..., :context_len]
return positional_attn
class FunnelRelMultiheadAttention(nn.Module):
def __init__(self, config, block_index):
super().__init__()
self.config = config
self.block_index = block_index
d_model, n_head, d_head = config.d_model, config.n_head, config.d_head
self.hidden_dropout = nn.Dropout(config.hidden_dropout)
self.attention_dropout = nn.Dropout(config.attention_dropout)
self.q_head = nn.Linear(d_model, n_head * d_head, bias=False)
self.k_head = nn.Linear(d_model, n_head * d_head)
self.v_head = nn.Linear(d_model, n_head * d_head)
self.r_w_bias = nn.Parameter(torch.zeros([n_head, d_head]))
self.r_r_bias = nn.Parameter(torch.zeros([n_head, d_head]))
self.r_kernel = nn.Parameter(torch.zeros([d_model, n_head, d_head]))
self.r_s_bias = nn.Parameter(torch.zeros([n_head, d_head]))
self.seg_embed = nn.Parameter(torch.zeros([2, n_head, d_head]))
self.post_proj = nn.Linear(n_head * d_head, d_model)
self.layer_norm = FunnelLayerNorm(d_model, eps=config.layer_norm_eps)
self.scale = 1.0 / (d_head ** 0.5)
def relative_positional_attention(self, position_embeds, q_head, context_len, cls_mask=None):
""" Relative attention score for the positional encodings """
# q_head has shape batch_size x sea_len x n_head x d_head
if self.config.attention_type == "factorized":
# Notations from the paper, appending A.2.2, final formula (https://arxiv.org/abs/2006.03236)
# phi and pi have shape seq_len x d_model, psi and omega have shape context_len x d_model
phi, pi, psi, omega = position_embeds
# Shape n_head x d_head
u = self.r_r_bias * self.scale
# Shape d_model x n_head x d_head
w_r = self.r_kernel
# Shape batch_size x sea_len x n_head x d_model
q_r_attention = torch.einsum("binh,dnh->bind", q_head + u, w_r)
q_r_attention_1 = q_r_attention * phi[:, None]
q_r_attention_2 = q_r_attention * pi[:, None]
# Shape batch_size x n_head x seq_len x context_len
positional_attn = torch.einsum("bind,jd->bnij", q_r_attention_1, psi) + torch.einsum(
"bind,jd->bnij", q_r_attention_2, omega
)
else:
shift = 2 if q_head.shape[1] != context_len else 1
# Notations from the paper, appending A.2.1, final formula (https://arxiv.org/abs/2006.03236)
# Grab the proper positional encoding, shape max_rel_len x d_model
r = position_embeds[self.block_index][shift - 1]
# Shape n_head x d_head
v = self.r_r_bias * self.scale
# Shape d_model x n_head x d_head
w_r = self.r_kernel
# Shape max_rel_len x n_head x d_model
r_head = torch.einsum("td,dnh->tnh", r, w_r)
# Shape batch_size x n_head x seq_len x max_rel_len
positional_attn = torch.einsum("binh,tnh->bnit", q_head + v, r_head)
# Shape batch_size x n_head x seq_len x context_len
positional_attn = _relative_shift_gather(positional_attn, context_len, shift)
if cls_mask is not None:
positional_attn *= cls_mask
return positional_attn
def relative_token_type_attention(self, token_type_mat, q_head, cls_mask=None):
""" Relative attention score for the token_type_ids """
if token_type_mat is None:
return 0
batch_size, seq_len, context_len = token_type_mat.shape
# q_head has shape batch_size x seq_len x n_head x d_head
# Shape n_head x d_head
r_s_bias = self.r_s_bias * self.scale
# Shape batch_size x n_head x seq_len x 2
token_type_bias = torch.einsum("bind,snd->bnis", q_head + r_s_bias, self.seg_embed)
# Shape batch_size x n_head x seq_len x context_len
token_type_mat = token_type_mat[:, None].expand([batch_size, q_head.shape[2], seq_len, context_len])
# Shapes batch_size x n_head x seq_len
diff_token_type, same_token_type = torch.split(token_type_bias, 1, dim=-1)
# Shape batch_size x n_head x seq_len x context_len
token_type_attn = torch.where(
token_type_mat, same_token_type.expand(token_type_mat.shape), diff_token_type.expand(token_type_mat.shape)
)
if cls_mask is not None:
token_type_attn *= cls_mask
return token_type_attn
def forward(self, query, key, value, attention_inputs, head_mask=None, output_attentions=False):
# q has shape batch_size x seq_len x d_model
# k and v have shapes batch_size x context_len x d_model
position_embeds, token_type_mat, attention_mask, cls_mask = attention_inputs
batch_size, seq_len, _ = query.shape
context_len = key.shape[1]
n_head, d_head = self.config.n_head, self.config.d_head
# Shape batch_size x seq_len x n_head x d_head
q_head = self.q_head(query).view(batch_size, seq_len, n_head, d_head)
# Shapes batch_size x context_len x n_head x d_head
k_head = self.k_head(key).view(batch_size, context_len, n_head, d_head)
v_head = self.v_head(value).view(batch_size, context_len, n_head, d_head)
q_head = q_head * self.scale
# Shape n_head x d_head
r_w_bias = self.r_w_bias * self.scale
# Shapes batch_size x n_head x seq_len x context_len
content_score = torch.einsum("bind,bjnd->bnij", q_head + r_w_bias, k_head)
positional_attn = self.relative_positional_attention(position_embeds, q_head, context_len, cls_mask)
token_type_attn = self.relative_token_type_attention(token_type_mat, q_head, cls_mask)
# merge attention scores
attn_score = content_score + positional_attn + token_type_attn
# precision safe in case of mixed precision training
dtype = attn_score.dtype
attn_score = attn_score.float()
# perform masking
if attention_mask is not None:
attn_score = attn_score - INF * attention_mask[:, None, None].float()
# attention probability
attn_prob = torch.softmax(attn_score, dim=-1, dtype=dtype)
attn_prob = self.attention_dropout(attn_prob)
# attention output, shape batch_size x seq_len x n_head x d_head
attn_vec = torch.einsum("bnij,bjnd->bind", attn_prob, v_head)
# Shape shape batch_size x seq_len x d_model
attn_out = self.post_proj(attn_vec.reshape(batch_size, seq_len, n_head * d_head))
attn_out = self.hidden_dropout(attn_out)
output = self.layer_norm(query + attn_out)
return (output, attn_prob) if output_attentions else (output,)
class FunnelPositionwiseFFN(nn.Module):
def __init__(self, config):
super().__init__()
self.linear_1 = nn.Linear(config.d_model, config.d_inner)
self.activation_function = ACT2FN[config.hidden_act]
self.activation_dropout = nn.Dropout(config.activation_dropout)
self.linear_2 = nn.Linear(config.d_inner, config.d_model)
self.dropout = nn.Dropout(config.hidden_dropout)
self.layer_norm = FunnelLayerNorm(config.d_model, config.layer_norm_eps)
def forward(self, hidden):
h = self.linear_1(hidden)
h = self.activation_function(h)
h = self.activation_dropout(h)
h = self.linear_2(h)
h = self.dropout(h)
return self.layer_norm(hidden + h)
class FunnelLayer(nn.Module):
def __init__(self, config, block_index):
super().__init__()
self.attention = FunnelRelMultiheadAttention(config, block_index)
self.ffn = FunnelPositionwiseFFN(config)
def forward(self, q, k, v, attention_inputs, output_attentions=False):
attn = self.attention(q, k, v, attention_inputs, output_attentions=output_attentions)
output = self.ffn(attn[0])
return (output, attn[1]) if output_attentions else (output,)
class FunnelEncoder(nn.Module):
def __init__(self, config):
super().__init__()
self.config = config
self.attention_structure = FunnelAttentionStructure(config)
self.blocks = nn.ModuleList(
[
nn.ModuleList([FunnelLayer(config, block_index) for _ in range(block_size)])
for block_index, block_size in enumerate(config.block_sizes)
]
)
def forward(
self,
inputs_embeds,
attention_mask=None,
token_type_ids=None,
output_attentions=False,
output_hidden_states=False,
return_dict=False,
):
# The pooling is not implemented on long tensors, so we convert this mask.
attention_mask = attention_mask.type_as(inputs_embeds)
attention_inputs = self.attention_structure.init_attention_inputs(
inputs_embeds,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
)
hidden = inputs_embeds
all_hidden_states = (inputs_embeds,) if output_hidden_states else None
all_attentions = () if output_attentions else None
for block_index, block in enumerate(self.blocks):
pooling_flag = hidden.size(1) > (2 if self.config.separate_cls else 1)
pooling_flag = pooling_flag and block_index > 0
if pooling_flag:
pooled_hidden, attention_inputs = self.attention_structure.pre_attention_pooling(
hidden, attention_inputs
)
for (layer_index, layer) in enumerate(block):
for repeat_index in range(self.config.block_repeats[block_index]):
do_pooling = (repeat_index == 0) and (layer_index == 0) and pooling_flag
if do_pooling:
query = pooled_hidden
key = value = hidden if self.config.pool_q_only else pooled_hidden
else:
query = key = value = hidden
layer_output = layer(query, key, value, attention_inputs, output_attentions=output_attentions)
hidden = layer_output[0]
if do_pooling:
attention_inputs = self.attention_structure.post_attention_pooling(attention_inputs)
if output_attentions:
all_attentions = all_attentions + layer_output[1:]
if output_hidden_states:
all_hidden_states = all_hidden_states + (hidden,)
if not return_dict:
return tuple(v for v in [hidden, all_hidden_states, all_attentions] if v is not None)
return BaseModelOutput(last_hidden_state=hidden, hidden_states=all_hidden_states, attentions=all_attentions)
def upsample(x, stride, target_len, separate_cls=True, truncate_seq=False):
"""Upsample tensor `x` to match `target_len` by repeating the tokens `stride` time on the sequence length
dimension."""
if stride == 1:
return x
if separate_cls:
cls = x[:, :1]
x = x[:, 1:]
output = torch.repeat_interleave(x, repeats=stride, dim=1)
if separate_cls:
if truncate_seq:
output = nn.functional.pad(output, (0, 0, 0, stride - 1, 0, 0))
output = output[:, : target_len - 1]
output = torch.cat([cls, output], dim=1)
else:
output = output[:, :target_len]
return output
class FunnelDecoder(nn.Module):
def __init__(self, config):
super().__init__()
self.config = config
self.attention_structure = FunnelAttentionStructure(config)
self.layers = nn.ModuleList([FunnelLayer(config, 0) for _ in range(config.num_decoder_layers)])
def forward(
self,
final_hidden,
first_block_hidden,
attention_mask=None,
token_type_ids=None,
output_attentions=False,
output_hidden_states=False,
return_dict=False,
):
upsampled_hidden = upsample(
final_hidden,
stride=2 ** (len(self.config.block_sizes) - 1),
target_len=first_block_hidden.shape[1],
separate_cls=self.config.separate_cls,
truncate_seq=self.config.truncate_seq,
)
hidden = upsampled_hidden + first_block_hidden
all_hidden_states = (hidden,) if output_hidden_states else None
all_attentions = () if output_attentions else None
attention_inputs = self.attention_structure.init_attention_inputs(
hidden,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
)
for layer in self.layers:
layer_output = layer(hidden, hidden, hidden, attention_inputs, output_attentions=output_attentions)
hidden = layer_output[0]
if output_attentions:
all_attentions = all_attentions + layer_output[1:]
if output_hidden_states:
all_hidden_states = all_hidden_states + (hidden,)
if not return_dict:
return tuple(v for v in [hidden, all_hidden_states, all_attentions] if v is not None)
return BaseModelOutput(last_hidden_state=hidden, hidden_states=all_hidden_states, attentions=all_attentions)
class FunnelDiscriminatorPredictions(nn.Module):
"""Prediction module for the discriminator, made up of two dense layers."""
def __init__(self, config):
super().__init__()
self.config = config
self.dense = nn.Linear(config.d_model, config.d_model)
self.dense_prediction = nn.Linear(config.d_model, 1)
def forward(self, discriminator_hidden_states):
hidden_states = self.dense(discriminator_hidden_states)
hidden_states = ACT2FN[self.config.hidden_act](hidden_states)
logits = self.dense_prediction(hidden_states).squeeze()
return logits
class FunnelPreTrainedModel(PreTrainedModel):
"""An abstract class to handle weights initialization and
a simple interface for downloading and loading pretrained models.
"""
config_class = FunnelConfig
load_tf_weights = load_tf_weights_in_funnel
base_model_prefix = "funnel"
def _init_weights(self, module):
classname = module.__class__.__name__
if classname.find("Linear") != -1:
if getattr(module, "weight", None) is not None:
if self.config.initializer_std is None:
fan_out, fan_in = module.weight.shape
std = np.sqrt(1.0 / float(fan_in + fan_out))
else:
std = self.config.initializer_std
nn.init.normal_(module.weight, std=std)
if getattr(module, "bias", None) is not None:
nn.init.constant_(module.bias, 0.0)
elif classname == "FunnelRelMultiheadAttention":
nn.init.uniform_(module.r_w_bias, b=self.config.initializer_range)
nn.init.uniform_(module.r_r_bias, b=self.config.initializer_range)
nn.init.uniform_(module.r_kernel, b=self.config.initializer_range)
nn.init.uniform_(module.r_s_bias, b=self.config.initializer_range)
nn.init.uniform_(module.seg_embed, b=self.config.initializer_range)
elif classname == "FunnelEmbeddings":
std = 1.0 if self.config.initializer_std is None else self.config.initializer_std
nn.init.normal_(module.word_embeddings.weight, std=std)
class FunnelClassificationHead(nn.Module):
def __init__(self, config, n_labels):
super().__init__()
self.linear_hidden = nn.Linear(config.d_model, config.d_model)
self.dropout = nn.Dropout(config.hidden_dropout)
self.linear_out = nn.Linear(config.d_model, n_labels)
def forward(self, hidden):
hidden = self.linear_hidden(hidden)
hidden = F.tanh(hidden)
hidden = self.dropout(hidden)
return self.linear_out(hidden)
@dataclass
class FunnelForPreTrainingOutput(ModelOutput):
"""
Output type of :class:`~transformers.FunnelForPreTrainingModel`.
Args:
loss (`optional`, returned when ``labels`` is provided, ``torch.FloatTensor`` of shape :obj:`(1,)`):
Total loss of the ELECTRA-style objective.
logits (:obj:`torch.FloatTensor` of shape :obj:`(batch_size, sequence_length)`):
Prediction scores of the head (scores for each token before SoftMax).
hidden_states (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
Tuple of :obj:`torch.FloatTensor` (one for the output of the embeddings + one for the output of each layer)
of shape :obj:`(batch_size, sequence_length, hidden_size)`.
Hidden-states of the model at the output of each layer plus the initial embedding outputs.
attentions (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_attentions=True`` is passed or when ``config.output_attentions=True``):
Tuple of :obj:`torch.FloatTensor` (one for each layer) of shape
:obj:`(batch_size, num_heads, sequence_length, sequence_length)`.
Attentions weights after the attention softmax, used to compute the weighted average in the self-attention
heads.
"""
loss: Optional[torch.FloatTensor] = None
logits: torch.FloatTensor = None
hidden_states: Optional[Tuple[torch.FloatTensor]] = None
attentions: Optional[Tuple[torch.FloatTensor]] = None
FUNNEL_START_DOCSTRING = r""" The Funnel Transformer model was proposed in
`Funnel-Transformer: Filtering out Sequential Redundancy for Efficient Language Processing
<https://arxiv.org/abs/2006.03236>`__ by Zihang Dai, Guokun Lai, Yiming Yang, Quoc V. Le.
This model is a PyTorch `torch.nn.Module <https://pytorch.org/docs/stable/nn.html#torch.nn.Module>`_ sub-class.
Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general
usage and behavior.
Parameters:
config (:class:`~transformers.FunnelConfig`): Model configuration class with all the parameters of the model.
Initializing with a config file does not load the weights associated with the model, only the configuration.
Check out the :meth:`~transformers.PreTrainedModel.from_pretrained` method to load the model weights.
"""
FUNNEL_INPUTS_DOCSTRING = r"""
Inputs:
input_ids (:obj:`torch.LongTensor` of shape :obj:`{0}`):
Indices of input sequence tokens in the vocabulary.
Indices can be obtained using :class:`transformers.FunnelTokenizer`.
See :func:`transformers.PreTrainedTokenizer.encode` and
:func:`transformers.PreTrainedTokenizer.__call__` for details.
`What are input IDs? <../glossary.html#input-ids>`__
attention_mask (:obj:`torch.FloatTensor` of shape :obj:`{0}`, `optional`, defaults to :obj:`None`):
Mask to avoid performing attention on padding token indices.
Mask values selected in ``[0, 1]``:
``1`` for tokens that are NOT MASKED, ``0`` for MASKED tokens.
`What are attention masks? <../glossary.html#attention-mask>`__
token_type_ids (:obj:`torch.LongTensor` of shape :obj:`{0}`, `optional`, defaults to :obj:`None`):
Segment token indices to indicate first and second portions of the inputs.
Indices are selected in ``[0, 1]``: ``0`` corresponds to a `sentence A` token, ``1``
corresponds to a `sentence B` token
`What are token type IDs? <../glossary.html#token-type-ids>`_
inputs_embeds (:obj:`torch.FloatTensor` of shape :obj:`(batch_size, sequence_length, hidden_size)`, `optional`, defaults to :obj:`None`):
Optionally, instead of passing :obj:`input_ids` you can choose to directly pass an embedded representation.
This is useful if you want more control over how to convert `input_ids` indices into associated vectors
than the model's internal embedding lookup matrix.
output_attentions (:obj:`bool`, `optional`, defaults to :obj:`None`):
If set to ``True``, the attentions tensors of all attention layers are returned. See ``attentions`` under returned tensors for more detail.
output_hidden_states (:obj:`bool`, `optional`, defaults to :obj:`None`):
If set to ``True``, the hidden states of all layers are returned. See ``hidden_states`` under returned tensors for more detail.
return_dict (:obj:`bool`, `optional`, defaults to :obj:`None`):
If set to ``True``, the model will return a :class:`~transformers.file_utils.ModelOutput` instead of a
plain tuple.
"""
@add_start_docstrings(
""" The base Funnel Transformer Model transformer outputting raw hidden-states without upsampling head (also called
decoder) or any task-specific head on top.""",
FUNNEL_START_DOCSTRING,
)
class FunnelBaseModel(FunnelPreTrainedModel):
def __init__(self, config):
super().__init__(config)
self.embeddings = FunnelEmbeddings(config)
self.encoder = FunnelEncoder(config)
self.init_weights()
def get_input_embeddings(self):
return self.embeddings.word_embeddings
def set_input_embeddings(self, new_embeddings):
self.embeddings.word_embeddings = new_embeddings
@add_start_docstrings_to_callable(FUNNEL_INPUTS_DOCSTRING.format("(batch_size, sequence_length)"))
@add_code_sample_docstrings(
tokenizer_class=_TOKENIZER_FOR_DOC,
checkpoint="funnel-transformer/small-base",
output_type=BaseModelOutput,
config_class=_CONFIG_FOR_DOC,
)
def forward(
self,
input_ids=None,
attention_mask=None,
token_type_ids=None,
position_ids=None,
head_mask=None,
inputs_embeds=None,
output_attentions=None,
output_hidden_states=None,
return_dict=None,
):
output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
output_hidden_states = (
output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
)
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
if input_ids is not None and inputs_embeds is not None:
raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time")
elif input_ids is not None:
input_shape = input_ids.size()
elif inputs_embeds is not None:
input_shape = inputs_embeds.size()[:-1]
else:
raise ValueError("You have to specify either input_ids or inputs_embeds")
device = input_ids.device if input_ids is not None else inputs_embeds.device
if attention_mask is None:
attention_mask = torch.ones(input_shape, device=device)
if token_type_ids is None:
token_type_ids = torch.zeros(input_shape, dtype=torch.long, device=device)
# TODO: deal with head_mask
if inputs_embeds is None:
inputs_embeds = self.embeddings(input_ids)
encoder_outputs = self.encoder(
inputs_embeds,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
output_attentions=output_attentions,
output_hidden_states=output_hidden_states,
return_dict=return_dict,
)
return encoder_outputs
@add_start_docstrings(
"The bare base Funnel Transformer Model transformer outputting raw hidden-states without any specific head on top.",
FUNNEL_START_DOCSTRING,
)
class FunnelModel(FunnelPreTrainedModel):
def __init__(self, config):
super().__init__(config)
self.config = config
self.embeddings = FunnelEmbeddings(config)
self.encoder = FunnelEncoder(config)
self.decoder = FunnelDecoder(config)
self.init_weights()
def get_input_embeddings(self):
return self.embeddings.word_embeddings
def set_input_embeddings(self, new_embeddings):
self.embeddings.word_embeddings = new_embeddings
@add_start_docstrings_to_callable(FUNNEL_INPUTS_DOCSTRING.format("(batch_size, sequence_length)"))
@add_code_sample_docstrings(
tokenizer_class=_TOKENIZER_FOR_DOC,
checkpoint="funnel-transformer/small",
output_type=BaseModelOutput,
config_class=_CONFIG_FOR_DOC,
)
def forward(
self,
input_ids=None,
attention_mask=None,
token_type_ids=None,
inputs_embeds=None,
output_attentions=None,
output_hidden_states=None,
return_dict=None,
):
output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
output_hidden_states = (
output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
)
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
if input_ids is not None and inputs_embeds is not None:
raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time")
elif input_ids is not None:
input_shape = input_ids.size()
elif inputs_embeds is not None:
input_shape = inputs_embeds.size()[:-1]
else:
raise ValueError("You have to specify either input_ids or inputs_embeds")
device = input_ids.device if input_ids is not None else inputs_embeds.device
if attention_mask is None:
attention_mask = torch.ones(input_shape, device=device)
if token_type_ids is None:
token_type_ids = torch.zeros(input_shape, dtype=torch.long, device=device)
# TODO: deal with head_mask
if inputs_embeds is None:
inputs_embeds = self.embeddings(input_ids)
encoder_outputs = self.encoder(
inputs_embeds,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
output_attentions=output_attentions,
output_hidden_states=True,
return_dict=return_dict,
)
decoder_outputs = self.decoder(
final_hidden=encoder_outputs[0],
first_block_hidden=encoder_outputs[1][self.config.block_sizes[0]],
attention_mask=attention_mask,
token_type_ids=token_type_ids,
output_attentions=output_attentions,
output_hidden_states=output_hidden_states,
return_dict=return_dict,
)
if not return_dict:
idx = 0
outputs = (decoder_outputs[0],)
if output_hidden_states:
idx += 1
outputs = outputs + (encoder_outputs[1] + decoder_outputs[idx],)
if output_attentions:
idx += 1
outputs = outputs + (encoder_outputs[2] + decoder_outputs[idx],)
return outputs
return BaseModelOutput(
last_hidden_state=decoder_outputs[0],
hidden_states=(encoder_outputs.hidden_states + decoder_outputs.hidden_states)
if output_hidden_states
else None,
attentions=(encoder_outputs.attentions + decoder_outputs.attentions) if output_attentions else None,
)
add_start_docstrings(
"""
Funnel Transformer model with a binary classification head on top as used during pretraining for identifying
generated tokens.""",
FUNNEL_START_DOCSTRING,
)
class FunnelForPreTraining(FunnelPreTrainedModel):
def __init__(self, config):
super().__init__(config)
self.funnel = FunnelModel(config)
self.discriminator_predictions = FunnelDiscriminatorPredictions(config)
self.init_weights()
@add_start_docstrings_to_callable(FUNNEL_INPUTS_DOCSTRING)
@replace_return_docstrings(output_type=FunnelForPreTrainingOutput, config_class=_CONFIG_FOR_DOC)
def forward(
self,
input_ids=None,
attention_mask=None,
token_type_ids=None,
inputs_embeds=None,
labels=None,
output_attentions=None,
output_hidden_states=None,
return_dict=None,
):
r"""
labels (``torch.LongTensor`` of shape ``(batch_size, sequence_length)``, `optional`, defaults to :obj:`None`):
Labels for computing the ELECTRA-style loss. Input should be a sequence of tokens (see :obj:`input_ids` docstring)
Indices should be in ``[0, 1]``.
``0`` indicates the token is an original token,
``1`` indicates the token was replaced.
Returns:
Examples::
>>> from transformers import FunnelTokenizer, FunnelForPreTraining
>>> import torch
>>> tokenizer = FunnelTokenizer.from_pretrained('funnel-transformer/small')
>>> model = FunnelForPreTraining.from_pretrained('funnel-transformer/small')
>>> input_ids = torch.tensor(tokenizer.encode("Hello, my dog is cute", add_special_tokens=True)).unsqueeze(0) # Batch size 1
>>> logits = model(input_ids).logits
"""
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
discriminator_hidden_states = self.funnel(
input_ids,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
inputs_embeds=inputs_embeds,
output_attentions=output_attentions,
output_hidden_states=output_hidden_states,
return_dict=return_dict,
)
discriminator_sequence_output = discriminator_hidden_states[0]
logits = self.discriminator_predictions(discriminator_sequence_output)
loss = None
if labels is not None:
loss_fct = nn.BCEWithLogitsLoss()
if attention_mask is not None:
active_loss = attention_mask.view(-1, discriminator_sequence_output.shape[1]) == 1
active_logits = logits.view(-1, discriminator_sequence_output.shape[1])[active_loss]
active_labels = labels[active_loss]
loss = loss_fct(active_logits, active_labels.float())
else:
loss = loss_fct(logits.view(-1, discriminator_sequence_output.shape[1]), labels.float())
if not return_dict:
output = (logits,) + discriminator_hidden_states[1:]
return ((loss,) + output) if loss is not None else output
return FunnelForPreTrainingOutput(
loss=loss,
logits=logits,
hidden_states=discriminator_hidden_states.hidden_states,
attentions=discriminator_hidden_states.attentions,
)
@add_start_docstrings("""Funnel Transformer Model with a `language modeling` head on top. """, FUNNEL_START_DOCSTRING)
class FunnelForMaskedLM(FunnelPreTrainedModel):
def __init__(self, config):
super().__init__(config)
self.funnel = FunnelModel(config)
self.lm_head = nn.Linear(config.d_model, config.vocab_size)
self.init_weights()
def get_output_embeddings(self):
return self.lm_head
@add_start_docstrings_to_callable(FUNNEL_INPUTS_DOCSTRING.format("(batch_size, sequence_length)"))
@add_code_sample_docstrings(
tokenizer_class=_TOKENIZER_FOR_DOC,
checkpoint="funnel-transformer/small",
output_type=MaskedLMOutput,
config_class=_CONFIG_FOR_DOC,
)
def forward(
self,
input_ids=None,
attention_mask=None,
token_type_ids=None,
inputs_embeds=None,
labels=None,
output_attentions=None,
output_hidden_states=None,
return_dict=None,
):
r"""
labels (:obj:`torch.LongTensor` of shape :obj:`(batch_size, sequence_length)`, `optional`, defaults to :obj:`None`):
Labels for computing the masked language modeling loss.
Indices should be in ``[-100, 0, ..., config.vocab_size]`` (see ``input_ids`` docstring)
Tokens with indices set to ``-100`` are ignored (masked), the loss is only computed for the tokens with labels
in ``[0, ..., config.vocab_size]``
"""
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
outputs = self.funnel(
input_ids,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
inputs_embeds=inputs_embeds,
output_attentions=output_attentions,
output_hidden_states=output_hidden_states,
return_dict=return_dict,
)
last_hidden_state = outputs[0]
prediction_logits = self.lm_head(last_hidden_state)
masked_lm_loss = None
if labels is not None:
loss_fct = CrossEntropyLoss() # -100 index = padding token
masked_lm_loss = loss_fct(prediction_logits.view(-1, self.config.vocab_size), labels.view(-1))
if not return_dict:
output = (prediction_logits,) + outputs[1:]
return ((masked_lm_loss,) + output) if masked_lm_loss is not None else output
return MaskedLMOutput(
loss=masked_lm_loss,
logits=prediction_logits,
hidden_states=outputs.hidden_states,
attentions=outputs.attentions,
)
@add_start_docstrings(
"""Funnel Transfprmer Model with a sequence classification/regression head on top (two linear layer on top of
the first timestep of the last hidden state) e.g. for GLUE tasks. """,
FUNNEL_START_DOCSTRING,
)
class FunnelForSequenceClassification(FunnelPreTrainedModel):
def __init__(self, config):
super().__init__(config)
self.num_labels = config.num_labels
self.funnel = FunnelBaseModel(config)
self.classifier = FunnelClassificationHead(config, config.num_labels)
self.init_weights()
@add_start_docstrings_to_callable(FUNNEL_INPUTS_DOCSTRING.format("(batch_size, sequence_length)"))
@add_code_sample_docstrings(
tokenizer_class=_TOKENIZER_FOR_DOC,
checkpoint="funnel-transformer/small-base",
output_type=SequenceClassifierOutput,
config_class=_CONFIG_FOR_DOC,
)
def forward(
self,
input_ids=None,
attention_mask=None,
token_type_ids=None,
inputs_embeds=None,
labels=None,
output_attentions=None,
output_hidden_states=None,
return_dict=None,
):
r"""
labels (:obj:`torch.LongTensor` of shape :obj:`(batch_size,)`, `optional`, defaults to :obj:`None`):
Labels for computing the sequence classification/regression loss.
Indices should be in :obj:`[0, ..., config.num_labels - 1]`.
If :obj:`config.num_labels == 1` a regression loss is computed (Mean-Square loss),
If :obj:`config.num_labels > 1` a classification loss is computed (Cross-Entropy).
"""
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
outputs = self.funnel(
input_ids,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
inputs_embeds=inputs_embeds,
output_attentions=output_attentions,
output_hidden_states=output_hidden_states,
return_dict=return_dict,
)
last_hidden_state = outputs[0]
pooled_output = last_hidden_state[:, 0]
logits = self.classifier(pooled_output)
loss = None
if labels is not None:
if self.num_labels == 1:
# We are doing regression
loss_fct = MSELoss()
loss = loss_fct(logits.view(-1), labels.view(-1))
else:
loss_fct = CrossEntropyLoss()
loss = loss_fct(logits.view(-1, self.num_labels), labels.view(-1))
if not return_dict:
output = (logits,) + outputs[1:]
return ((loss,) + output) if loss is not None else output
return SequenceClassifierOutput(
loss=loss,
logits=logits,
hidden_states=outputs.hidden_states,
attentions=outputs.attentions,
)
@add_start_docstrings(
"""Funnel Transformer Model with a multiple choice classification head on top (two linear layer on top of
the first timestep of the last hidden state, and a softmax) e.g. for RocStories/SWAG tasks. """,
FUNNEL_START_DOCSTRING,
)
class FunnelForMultipleChoice(FunnelPreTrainedModel):
def __init__(self, config):
super().__init__(config)
self.funnel = FunnelBaseModel(config)
self.classifier = FunnelClassificationHead(config, 1)
self.init_weights()
@add_start_docstrings_to_callable(FUNNEL_INPUTS_DOCSTRING.format("(batch_size, num_choices, sequence_length)"))
@add_code_sample_docstrings(
tokenizer_class=_TOKENIZER_FOR_DOC,
checkpoint="funnel-transformer/small-base",
output_type=MultipleChoiceModelOutput,
config_class=_CONFIG_FOR_DOC,
)
def forward(
self,
input_ids=None,
attention_mask=None,
token_type_ids=None,
inputs_embeds=None,
labels=None,
output_attentions=None,
output_hidden_states=None,
return_dict=None,
):
r"""
labels (:obj:`torch.LongTensor` of shape :obj:`(batch_size,)`, `optional`, defaults to :obj:`None`):
Labels for computing the multiple choice classification loss.
Indices should be in ``[0, ..., num_choices-1]`` where `num_choices` is the size of the second dimension
of the input tensors. (see `input_ids` above)
"""
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
num_choices = input_ids.shape[1] if input_ids is not None else inputs_embeds.shape[1]
input_ids = input_ids.view(-1, input_ids.size(-1)) if input_ids is not None else None
attention_mask = attention_mask.view(-1, attention_mask.size(-1)) if attention_mask is not None else None
token_type_ids = token_type_ids.view(-1, token_type_ids.size(-1)) if token_type_ids is not None else None
inputs_embeds = (
inputs_embeds.view(-1, inputs_embeds.size(-2), inputs_embeds.size(-1))
if inputs_embeds is not None
else None
)
outputs = self.funnel(
input_ids,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
inputs_embeds=inputs_embeds,
output_attentions=output_attentions,
output_hidden_states=output_hidden_states,
return_dict=return_dict,
)
last_hidden_state = outputs[0]
pooled_output = last_hidden_state[:, 0]
logits = self.classifier(pooled_output)
reshaped_logits = logits.view(-1, num_choices)
loss = None
if labels is not None:
loss_fct = CrossEntropyLoss()
loss = loss_fct(reshaped_logits, labels)
if not return_dict:
output = (reshaped_logits,) + outputs[1:]
return ((loss,) + output) if loss is not None else output
return MultipleChoiceModelOutput(
loss=loss,
logits=reshaped_logits,
hidden_states=outputs.hidden_states,
attentions=outputs.attentions,
)
@add_start_docstrings(
"""Funnel Transformer Model with a token classification head on top (a linear layer on top of
the hidden-states output) e.g. for Named-Entity-Recognition (NER) tasks. """,
FUNNEL_START_DOCSTRING,
)
class FunnelForTokenClassification(FunnelPreTrainedModel):
def __init__(self, config):
super().__init__(config)
self.num_labels = config.num_labels
self.funnel = FunnelModel(config)
self.dropout = nn.Dropout(config.hidden_dropout)
self.classifier = nn.Linear(config.hidden_size, config.num_labels)
self.init_weights()
@add_start_docstrings_to_callable(FUNNEL_INPUTS_DOCSTRING.format("(batch_size, sequence_length)"))
@add_code_sample_docstrings(
tokenizer_class=_TOKENIZER_FOR_DOC,
checkpoint="funnel-transformer/small",
output_type=TokenClassifierOutput,
config_class=_CONFIG_FOR_DOC,
)
def forward(
self,
input_ids=None,
attention_mask=None,
token_type_ids=None,
inputs_embeds=None,
labels=None,
output_attentions=None,
output_hidden_states=None,
return_dict=None,
):
r"""
labels (:obj:`torch.LongTensor` of shape :obj:`(batch_size, sequence_length)`, `optional`, defaults to :obj:`None`):
Labels for computing the token classification loss.
Indices should be in ``[0, ..., config.num_labels - 1]``.
"""
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
outputs = self.funnel(
input_ids,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
inputs_embeds=inputs_embeds,
output_attentions=output_attentions,
output_hidden_states=output_hidden_states,
return_dict=return_dict,
)
last_hidden_state = outputs[0]
last_hidden_state = self.dropout(last_hidden_state)
logits = self.classifier(last_hidden_state)
loss = None
if labels is not None:
loss_fct = CrossEntropyLoss()
# Only keep active parts of the loss
if attention_mask is not None:
active_loss = attention_mask.view(-1) == 1
active_logits = logits.view(-1, self.num_labels)
active_labels = torch.where(
active_loss, labels.view(-1), torch.tensor(loss_fct.ignore_index).type_as(labels)
)
loss = loss_fct(active_logits, active_labels)
else:
loss = loss_fct(logits.view(-1, self.num_labels), labels.view(-1))
if not return_dict:
output = (logits,) + outputs[1:]
return ((loss,) + output) if loss is not None else output
return TokenClassifierOutput(
loss=loss,
logits=logits,
hidden_states=outputs.hidden_states,
attentions=outputs.attentions,
)
@add_start_docstrings(
"""Funnel Transformer Model with a span classification head on top for extractive question-answering tasks like
SQuAD (a linear layer on top of the hidden-states output to compute `span start logits` and `span end logits`).""",
FUNNEL_START_DOCSTRING,
)
class FunnelForQuestionAnswering(FunnelPreTrainedModel):
def __init__(self, config):
super().__init__(config)
self.num_labels = config.num_labels
self.funnel = FunnelModel(config)
self.qa_outputs = nn.Linear(config.hidden_size, config.num_labels)
self.init_weights()
@add_start_docstrings_to_callable(FUNNEL_INPUTS_DOCSTRING.format("(batch_size, sequence_length)"))
@add_code_sample_docstrings(
tokenizer_class=_TOKENIZER_FOR_DOC,
checkpoint="funnel-transformer/small",
output_type=QuestionAnsweringModelOutput,
config_class=_CONFIG_FOR_DOC,
)
def forward(
self,
input_ids=None,
attention_mask=None,
token_type_ids=None,
inputs_embeds=None,
start_positions=None,
end_positions=None,
output_attentions=None,
output_hidden_states=None,
return_dict=None,
):
r"""
start_positions (:obj:`torch.LongTensor` of shape :obj:`(batch_size,)`, `optional`, defaults to :obj:`None`):
Labels for position (index) of the start of the labelled span for computing the token classification loss.
Positions are clamped to the length of the sequence (`sequence_length`).
Position outside of the sequence are not taken into account for computing the loss.
end_positions (:obj:`torch.LongTensor` of shape :obj:`(batch_size,)`, `optional`, defaults to :obj:`None`):
Labels for position (index) of the end of the labelled span for computing the token classification loss.
Positions are clamped to the length of the sequence (`sequence_length`).
Position outside of the sequence are not taken into account for computing the loss.
"""
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
outputs = self.funnel(
input_ids,
attention_mask=attention_mask,
token_type_ids=token_type_ids,
inputs_embeds=inputs_embeds,
output_attentions=output_attentions,
output_hidden_states=output_hidden_states,
return_dict=return_dict,
)
last_hidden_state = outputs[0]
logits = self.qa_outputs(last_hidden_state)
start_logits, end_logits = logits.split(1, dim=-1)
start_logits = start_logits.squeeze(-1)
end_logits = end_logits.squeeze(-1)
total_loss = None
if start_positions is not None and end_positions is not None:
# If we are on multi-GPU, split add a dimension
if len(start_positions.size()) > 1:
start_positions = start_positions.squeze(-1)
if len(end_positions.size()) > 1:
end_positions = end_positions.squeeze(-1)
# sometimes the start/end positions are outside our model inputs, we ignore these terms
ignored_index = start_logits.size(1)
start_positions.clamp_(0, ignored_index)
end_positions.clamp_(0, ignored_index)
loss_fct = CrossEntropyLoss(ignore_index=ignored_index)
start_loss = loss_fct(start_logits, start_positions)
end_loss = loss_fct(end_logits, end_positions)
total_loss = (start_loss + end_loss) / 2
if not return_dict:
output = (start_logits, end_logits) + outputs[1:]
return ((total_loss,) + output) if total_loss is not None else output
return QuestionAnsweringModelOutput(
loss=total_loss,
start_logits=start_logits,
end_logits=end_logits,
hidden_states=outputs.hidden_states,
attentions=outputs.attentions,
)
src/transformers/tokenization_auto.py
View file @ d155b38d
......@@ -27,6 +27,7 @@ from .configuration_auto import (
DistilBertConfig,
ElectraConfig,
FlaubertConfig,
FunnelConfig,
GPT2Config,
LongformerConfig,
LxmertConfig,
......@@ -54,6 +55,7 @@ from .tokenization_ctrl import CTRLTokenizer
from .tokenization_distilbert import DistilBertTokenizer, DistilBertTokenizerFast
from .tokenization_electra import ElectraTokenizer, ElectraTokenizerFast
from .tokenization_flaubert import FlaubertTokenizer
from .tokenization_funnel import FunnelTokenizer, FunnelTokenizerFast
from .tokenization_gpt2 import GPT2Tokenizer, GPT2TokenizerFast
from .tokenization_longformer import LongformerTokenizer, LongformerTokenizerFast
from .tokenization_lxmert import LxmertTokenizer, LxmertTokenizerFast
......@@ -93,6 +95,7 @@ TOKENIZER_MAPPING = OrderedDict(
(RobertaConfig, (RobertaTokenizer, RobertaTokenizerFast)),
(ReformerConfig, (ReformerTokenizer, None)),
(ElectraConfig, (ElectraTokenizer, ElectraTokenizerFast)),
(FunnelConfig, (FunnelTokenizer, FunnelTokenizerFast)),
(LxmertConfig, (LxmertTokenizer, LxmertTokenizerFast)),
(BertConfig, (BertTokenizer, BertTokenizerFast)),
(OpenAIGPTConfig, (OpenAIGPTTokenizer, OpenAIGPTTokenizerFast)),
......@@ -131,6 +134,7 @@ class AutoTokenizer:
- `xlm`: XLMTokenizer (XLM model)
- `ctrl`: CTRLTokenizer (Salesforce CTRL model)
- `electra`: ElectraTokenizer (Google ELECTRA model)
- `funnel`: FunnelTokenizer (Funnel Transformer model)
- `lxmert`: LxmertTokenizer (Lxmert model)
This class cannot be instantiated using `__init__()` (throw an error).
......@@ -167,6 +171,7 @@ class AutoTokenizer:
- `xlm`: XLMTokenizer (XLM model)
- `ctrl`: CTRLTokenizer (Salesforce CTRL model)
- `electra`: ElectraTokenizer (Google ELECTRA model)
- `funnel`: FunnelTokenizer (Funnel Transformer model)
- `lxmert`: LxmertTokenizer (Lxmert model)
Params:
......
src/transformers/tokenization_funnel.py 0 → 100644
View file @ d155b38d
# coding=utf-8
# Copyright 2020 The HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" Tokenization class for Funnel Transformer."""
from typing import List, Optional
from .tokenization_bert import BertTokenizer, BertTokenizerFast
from .utils import logging
logger = logging.get_logger(__name__)
VOCAB_FILES_NAMES = {"vocab_file": "vocab.txt"}
_model_names = [
"small",
"small-base",
"medium",
"medium-base",
"intermediate",
"intermediate-base",
"large",
"large-base",
"xlarge",
"xlarge-base",
]
PRETRAINED_VOCAB_FILES_MAP = {
"vocab_file": {
"funnel-transformer/small": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/small/vocab.txt",
"funnel-transformer/small-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/small-base/vocab.txt",
"funnel-transformer/medium": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/medium/vocab.txt",
"funnel-transformer/medium-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/medium-base/vocab.txt",
"funnel-transformer/intermediate": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/intermediate/vocab.txt",
"funnel-transformer/intermediate-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/intermediate-base/vocab.txt",
"funnel-transformer/large": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/large/vocab.txt",
"funnel-transformer/large-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/large-base/vocab.txt",
"funnel-transformer/xlarge": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/xlarge/vocab.txt",
"funnel-transformer/xlarge-base": "https://s3.amazonaws.com/models.huggingface.co/bert/funnel-transformer/xlarge-base/vocab.txt",
}
}
PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES = {f"funnel-transformer/{name}": 512 for name in _model_names}
PRETRAINED_INIT_CONFIGURATION = {f"funnel-transformer/{name}": {"do_lower_case": True} for name in _model_names}
class FunnelTokenizer(BertTokenizer):
r"""
Tokenizer for the Funnel Transformer models.
:class:`~transformers.FunnelTokenizer` is identical to :class:`~transformers.BertTokenizer` and runs end-to-end
tokenization: punctuation splitting + wordpiece.
Refer to superclass :class:`~transformers.BertTokenizer` for usage examples and documentation concerning
parameters.
"""
vocab_files_names = VOCAB_FILES_NAMES
pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP
max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
pretrained_init_configuration = PRETRAINED_INIT_CONFIGURATION
cls_token_type_id: int = 2
def __init__(
self,
vocab_file,
do_lower_case=True,
do_basic_tokenize=True,
never_split=None,
unk_token="<unk>",
sep_token="<sep>",
pad_token="<pad>",
cls_token="<cls>",
mask_token="<mask>",
bos_token="<s>",
eos_token="</s>",
tokenize_chinese_chars=True,
strip_accents=None,
**kwargs
):
super().__init__(
vocab_file,
do_lower_case=do_lower_case,
do_basic_tokenize=do_basic_tokenize,
never_split=never_split,
unk_token=unk_token,
sep_token=sep_token,
pad_token=pad_token,
cls_token=cls_token,
mask_token=mask_token,
bos_token=bos_token,
eos_token=eos_token,
tokenize_chinese_chars=tokenize_chinese_chars,
strip_accents=strip_accents,
**kwargs,
)
def create_token_type_ids_from_sequences(
self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
) -> List[int]:
"""
Creates a mask from the two sequences passed to be used in a sequence-pair classification task.
Funnel Transformer expects a sequence pair mask that has the following format:
::
2 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
| first sequence | second sequence |
if token_ids_1 is None, only returns the first portion of the mask (0's).
Args:
token_ids_0 (:obj:`List[int]`):
List of ids.
token_ids_1 (:obj:`List[int]`, `optional`):
Optional second list of IDs for sequence pairs.
Returns:
:obj:`List[int]`: List of `token type IDs <../glossary.html#token-type-ids>`_ according to the given
sequence(s).
"""
sep = [self.sep_token_id]
cls = [self.cls_token_id]
if token_ids_1 is None:
return len(cls) * [self.cls_token_type_id] + len(token_ids_0 + sep) * [0]
return len(cls) * [self.cls_token_type_id] + len(token_ids_0 + sep) * [0] + len(token_ids_1 + sep) * [1]
class FunnelTokenizerFast(BertTokenizerFast):
r"""
"Fast" tokenizer for the Funnel Transformer models (backed by HuggingFace's :obj:`tokenizers` library).
:class:`~transformers.FunnelTokenizerFast` is identical to :class:`~transformers.BertTokenizerFast` and runs
end-to-end tokenization: punctuation splitting + wordpiece.
Refer to superclass :class:`~transformers.BertTokenizerFast` for usage examples and documentation concerning
parameters.
"""
vocab_files_names = VOCAB_FILES_NAMES
pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP
max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
pretrained_init_configuration = PRETRAINED_INIT_CONFIGURATION
cls_token_type_id: int = 2
def __init__(
self,
vocab_file,
do_lower_case=True,
unk_token="<unk>",
sep_token="<sep>",
pad_token="<pad>",
cls_token="<cls>",
mask_token="<mask>",
bos_token="<s>",
eos_token="</s>",
clean_text=True,
tokenize_chinese_chars=True,
strip_accents=None,
wordpieces_prefix="##",
**kwargs
):
super().__init__(
vocab_file,
do_lower_case=do_lower_case,
unk_token=unk_token,
sep_token=sep_token,
pad_token=pad_token,
cls_token=cls_token,
mask_token=mask_token,
bos_token=bos_token,
eos_token=eos_token,
clean_text=clean_text,
tokenize_chinese_chars=tokenize_chinese_chars,
strip_accents=strip_accents,
wordpieces_prefix=wordpieces_prefix,
**kwargs,
)
def create_token_type_ids_from_sequences(
self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
) -> List[int]:
"""
Creates a mask from the two sequences passed to be used in a sequence-pair classification task.
Funnel Transformer expects a sequence pair mask that has the following format:
::
2 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
| first sequence | second sequence |
if token_ids_1 is None, only returns the first portion of the mask (0's).
Args:
token_ids_0 (:obj:`List[int]`):
List of ids.
token_ids_1 (:obj:`List[int]`, `optional`):
Optional second list of IDs for sequence pairs.
Returns:
:obj:`List[int]`: List of `token type IDs <../glossary.html#token-type-ids>`_ according to the given
sequence(s).
"""
sep = [self.sep_token_id]
cls = [self.cls_token_id]
if token_ids_1 is None:
return len(cls) * [self.cls_token_type_id] + len(token_ids_0 + sep) * [0]
return len(cls) * [self.cls_token_type_id] + len(token_ids_0 + sep) * [0] + len(token_ids_1 + sep) * [1]
def _convert_encoding(self, encoding, **kwargs):
# The fast tokenizer doesn't use the function above so we fix the cls token type id when decoding the fast
# tokenzier output.
encoding_dict = super()._convert_encoding(encoding, **kwargs)
if "token_type_ids" in encoding_dict:
# Note: we can't assume the <cls> token is in first position because left padding is a thing, hence the
# double list comprehension.
encoding_dict["token_type_ids"] = [
[self.cls_token_type_id if i == self.cls_token_id else t for i, t in zip(input_ids, type_ids)]
for input_ids, type_ids in zip(encoding_dict["input_ids"], encoding_dict["token_type_ids"])
]
return encoding_dict
tests/test_modeling_common.py
View file @ d155b38d
......@@ -539,7 +539,10 @@ class ModelTesterMixin:
outputs = model(**self._prepare_for_class(inputs_dict, model_class))
hidden_states = outputs[-1]
self.assertEqual(len(hidden_states), self.model_tester.num_hidden_layers + 1)
expected_num_layers = getattr(
self.model_tester, "expected_num_hidden_layers", self.model_tester.num_hidden_layers + 1
)
self.assertEqual(len(hidden_states), expected_num_layers)
if hasattr(self.model_tester, "encoder_seq_length"):
seq_length = self.model_tester.encoder_seq_length
if hasattr(self.model_tester, "chunk_length") and self.model_tester.chunk_length > 1:
......
tests/test_modeling_funnel.py 0 → 100644
View file @ d155b38d
# coding=utf-8
# Copyright 2020 HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import unittest
from transformers import FunnelTokenizer, is_torch_available
from transformers.testing_utils import require_torch, slow, torch_device
from .test_configuration_common import ConfigTester
from .test_modeling_common import ModelTesterMixin, ids_tensor
if is_torch_available():
import torch
from transformers import (
FunnelBaseModel,
FunnelConfig,
FunnelForMaskedLM,
FunnelForMultipleChoice,
FunnelForPreTraining,
FunnelForQuestionAnswering,
FunnelForSequenceClassification,
FunnelForTokenClassification,
FunnelModel,
)
class FunnelModelTester:
"""You can also import this e.g, from .test_modeling_funnel import FunnelModelTester """
def __init__(
self,
parent,
batch_size=13,
seq_length=7,
is_training=True,
use_input_mask=True,
use_token_type_ids=True,
use_labels=True,
vocab_size=99,
block_sizes=[1, 1, 2],
num_decoder_layers=1,
d_model=32,
n_head=4,
d_head=8,
d_inner=37,
hidden_act="gelu_new",
hidden_dropout=0.1,
attention_dropout=0.1,
activation_dropout=0.0,
max_position_embeddings=512,
type_vocab_size=3,
num_labels=3,
num_choices=4,
scope=None,
base=False,
):
self.parent = parent
self.batch_size = batch_size
self.seq_length = seq_length
self.is_training = is_training
self.use_input_mask = use_input_mask
self.use_token_type_ids = use_token_type_ids
self.use_labels = use_labels
self.vocab_size = vocab_size
self.block_sizes = block_sizes
self.num_decoder_layers = num_decoder_layers
self.d_model = d_model
self.n_head = n_head
self.d_head = d_head
self.d_inner = d_inner
self.hidden_act = hidden_act
self.hidden_dropout = hidden_dropout
self.attention_dropout = attention_dropout
self.activation_dropout = activation_dropout
self.max_position_embeddings = max_position_embeddings
self.type_vocab_size = type_vocab_size
self.type_sequence_label_size = 2
self.num_labels = num_labels
self.num_choices = num_choices
self.scope = scope
# Used in the tests to check the size of the first attention layer
self.num_attention_heads = n_head
# Used in the tests to check the size of the first hidden state
self.hidden_size = self.d_model
# Used in the tests to check the number of output hidden states/attentions
self.num_hidden_layers = sum(self.block_sizes) + (0 if base else self.num_decoder_layers)
# FunnelModel adds two hidden layers: input embeddings and the sum of the upsampled encoder hidden state with
# the last hidden state of the first block (which is the first hidden state of the decoder).
if not base:
self.expected_num_hidden_layers = self.num_hidden_layers + 2
def prepare_config_and_inputs(self):
input_ids = ids_tensor([self.batch_size, self.seq_length], self.vocab_size)
input_mask = None
if self.use_input_mask:
input_mask = ids_tensor([self.batch_size, self.seq_length], vocab_size=2)
token_type_ids = None
if self.use_token_type_ids:
token_type_ids = ids_tensor([self.batch_size, self.seq_length], self.type_vocab_size)
sequence_labels = None
token_labels = None
choice_labels = None
if self.use_labels:
sequence_labels = ids_tensor([self.batch_size], self.type_sequence_label_size)
token_labels = ids_tensor([self.batch_size, self.seq_length], self.num_labels)
choice_labels = ids_tensor([self.batch_size], self.num_choices)
fake_token_labels = ids_tensor([self.batch_size, self.seq_length], 1)
config = FunnelConfig(
vocab_size=self.vocab_size,
block_sizes=self.block_sizes,
num_decoder_layers=self.num_decoder_layers,
d_model=self.d_model,
n_head=self.n_head,
d_head=self.d_head,
d_inner=self.d_inner,
hidden_act=self.hidden_act,
hidden_dropout=self.hidden_dropout,
attention_dropout=self.attention_dropout,
activation_dropout=self.activation_dropout,
max_position_embeddings=self.max_position_embeddings,
type_vocab_size=self.type_vocab_size,
return_dict=True,
)
return (
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
)
def create_and_check_model(
self,
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
):
model = FunnelModel(config=config)
model.to(torch_device)
model.eval()
result = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids)
result = model(input_ids, token_type_ids=token_type_ids)
result = model(input_ids)
self.parent.assertEqual(result.last_hidden_state.shape, (self.batch_size, self.seq_length, self.d_model))
model.config.truncate_seq = False
result = model(input_ids)
self.parent.assertEqual(result.last_hidden_state.shape, (self.batch_size, self.seq_length, self.d_model))
model.config.separate_cls = False
result = model(input_ids)
self.parent.assertEqual(result.last_hidden_state.shape, (self.batch_size, self.seq_length, self.d_model))
def create_and_check_base_model(
self,
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
):
model = FunnelBaseModel(config=config)
model.to(torch_device)
model.eval()
result = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids)
result = model(input_ids, token_type_ids=token_type_ids)
result = model(input_ids)
self.parent.assertEqual(result.last_hidden_state.shape, (self.batch_size, 2, self.d_model))
model.config.truncate_seq = False
result = model(input_ids)
self.parent.assertEqual(result.last_hidden_state.shape, (self.batch_size, 3, self.d_model))
model.config.separate_cls = False
result = model(input_ids)
self.parent.assertEqual(result.last_hidden_state.shape, (self.batch_size, 2, self.d_model))
def create_and_check_for_pretraining(
self,
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
):
config.num_labels = self.num_labels
model = FunnelForPreTraining(config=config)
model.to(torch_device)
model.eval()
result = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, labels=fake_token_labels)
self.parent.assertEqual(result.logits.shape, (self.batch_size, self.seq_length))
def create_and_check_for_masked_lm(
self,
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
):
model = FunnelForMaskedLM(config=config)
model.to(torch_device)
model.eval()
result = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, labels=token_labels)
self.parent.assertEqual(result.logits.shape, (self.batch_size, self.seq_length, self.vocab_size))
def create_and_check_for_sequence_classification(
self,
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
):
config.num_labels = self.num_labels
model = FunnelForSequenceClassification(config)
model.to(torch_device)
model.eval()
result = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, labels=sequence_labels)
self.parent.assertEqual(result.logits.shape, (self.batch_size, self.num_labels))
def create_and_check_for_multiple_choice(
self,
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
):
config.num_choices = self.num_choices
model = FunnelForMultipleChoice(config=config)
model.to(torch_device)
model.eval()
multiple_choice_inputs_ids = input_ids.unsqueeze(1).expand(-1, self.num_choices, -1).contiguous()
multiple_choice_token_type_ids = token_type_ids.unsqueeze(1).expand(-1, self.num_choices, -1).contiguous()
multiple_choice_input_mask = input_mask.unsqueeze(1).expand(-1, self.num_choices, -1).contiguous()
result = model(
multiple_choice_inputs_ids,
attention_mask=multiple_choice_input_mask,
token_type_ids=multiple_choice_token_type_ids,
labels=choice_labels,
)
self.parent.assertEqual(result.logits.shape, (self.batch_size, self.num_choices))
def create_and_check_for_token_classification(
self,
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
):
config.num_labels = self.num_labels
model = FunnelForTokenClassification(config=config)
model.to(torch_device)
model.eval()
result = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, labels=token_labels)
self.parent.assertEqual(result.logits.shape, (self.batch_size, self.seq_length, self.num_labels))
def create_and_check_for_question_answering(
self,
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
):
model = FunnelForQuestionAnswering(config=config)
model.to(torch_device)
model.eval()
result = model(
input_ids,
attention_mask=input_mask,
token_type_ids=token_type_ids,
start_positions=sequence_labels,
end_positions=sequence_labels,
)
self.parent.assertEqual(result.start_logits.shape, (self.batch_size, self.seq_length))
self.parent.assertEqual(result.end_logits.shape, (self.batch_size, self.seq_length))
def prepare_config_and_inputs_for_common(self):
config_and_inputs = self.prepare_config_and_inputs()
(
config,
input_ids,
token_type_ids,
input_mask,
sequence_labels,
token_labels,
choice_labels,
fake_token_labels,
) = config_and_inputs
inputs_dict = {"input_ids": input_ids, "token_type_ids": token_type_ids, "attention_mask": input_mask}
return config, inputs_dict
@require_torch
class FunnelModelTest(ModelTesterMixin, unittest.TestCase):
test_head_masking = False
test_pruning = False
all_model_classes = (
(
FunnelModel,
FunnelForMaskedLM,
FunnelForPreTraining,
FunnelForQuestionAnswering,
FunnelForTokenClassification,
)
if is_torch_available()
else ()
)
def setUp(self):
self.model_tester = FunnelModelTester(self)
self.config_tester = ConfigTester(self, config_class=FunnelConfig)
def test_config(self):
self.config_tester.run_common_tests()
def test_model(self):
config_and_inputs = self.model_tester.prepare_config_and_inputs()
self.model_tester.create_and_check_model(*config_and_inputs)
def test_for_pretraining(self):
config_and_inputs = self.model_tester.prepare_config_and_inputs()
self.model_tester.create_and_check_for_pretraining(*config_and_inputs)
def test_for_masked_lm(self):
config_and_inputs = self.model_tester.prepare_config_and_inputs()
self.model_tester.create_and_check_for_masked_lm(*config_and_inputs)
def test_for_token_classification(self):
config_and_inputs = self.model_tester.prepare_config_and_inputs()
self.model_tester.create_and_check_for_token_classification(*config_and_inputs)
def test_for_question_answering(self):
config_and_inputs = self.model_tester.prepare_config_and_inputs()
self.model_tester.create_and_check_for_question_answering(*config_and_inputs)
@require_torch
class FunnelBaseModelTest(ModelTesterMixin, unittest.TestCase):
test_head_masking = False
test_pruning = False
all_model_classes = (
(FunnelBaseModel, FunnelForMultipleChoice, FunnelForSequenceClassification) if is_torch_available() else ()
)
def setUp(self):
self.model_tester = FunnelModelTester(self, base=True)
self.config_tester = ConfigTester(self, config_class=FunnelConfig)
def test_config(self):
self.config_tester.run_common_tests()
def test_base_model(self):
config_and_inputs = self.model_tester.prepare_config_and_inputs()
self.model_tester.create_and_check_base_model(*config_and_inputs)
def test_for_sequence_classification(self):
config_and_inputs = self.model_tester.prepare_config_and_inputs()
self.model_tester.create_and_check_for_sequence_classification(*config_and_inputs)
def test_for_multiple_choice(self):
config_and_inputs = self.model_tester.prepare_config_and_inputs()
self.model_tester.create_and_check_for_multiple_choice(*config_and_inputs)
@require_torch
class FunnelModelIntegrationTest(unittest.TestCase):
def test_inference_tiny_model(self):
batch_size = 13
sequence_length = 7
input_ids = torch.arange(0, batch_size * sequence_length).long().reshape(batch_size, sequence_length)
lengths = [0, 1, 2, 3, 4, 5, 6, 4, 1, 3, 5, 0, 1]
token_type_ids = torch.tensor([[2] + [0] * a + [1] * (sequence_length - a - 1) for a in lengths])
model = FunnelModel.from_pretrained("sgugger/funnel-random-tiny")
output = model(input_ids, token_type_ids=token_type_ids)[0].abs()
expected_output_sum = torch.tensor(2344.9023)
expected_output_mean = torch.tensor(0.8053)
self.assertTrue(torch.allclose(output.sum(), expected_output_sum, atol=1e-4))
self.assertTrue(torch.allclose(output.mean(), expected_output_mean, atol=1e-4))
attention_mask = torch.tensor([[1] * 7, [1] * 4 + [0] * 3] * 6 + [[0, 1, 1, 0, 0, 1, 1]])
output = model(input_ids, attention_mask=attention_mask, token_type_ids=token_type_ids)[0].abs()
expected_output_sum = torch.tensor(2363.2178)
expected_output_mean = torch.tensor(0.8115)
self.assertTrue(torch.allclose(output.sum(), expected_output_sum, atol=1e-4))
self.assertTrue(torch.allclose(output.mean(), expected_output_mean, atol=1e-4))
@slow
def test_inference_model(self):
tokenizer = FunnelTokenizer.from_pretrained("huggingface/funnel-small")
model = FunnelModel.from_pretrained("huggingface/funnel-small")
inputs = tokenizer("Hello! I am the Funnel Transformer model.", return_tensors="pt")
output = model(**inputs)[0]
expected_output_sum = torch.tensor(235.7827)
expected_output_mean = torch.tensor(0.0256)
self.assertTrue(torch.allclose(output.sum(), expected_output_sum, atol=1e-4))
self.assertTrue(torch.allclose(output.mean(), expected_output_mean, atol=1e-4))
tests/test_tokenization_funnel.py 0 → 100644
View file @ d155b38d
# coding=utf-8
# Copyright 2020 HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import unittest
from transformers.tokenization_funnel import VOCAB_FILES_NAMES, FunnelTokenizer, FunnelTokenizerFast
from .test_tokenization_common import TokenizerTesterMixin
class FunnelTokenizationTest(TokenizerTesterMixin, unittest.TestCase):
tokenizer_class = FunnelTokenizer
test_rust_tokenizer = True
def setUp(self):
super().setUp()
vocab_tokens = [
"<unk>",
"<cls>",
"<sep>",
"want",
"##want",
"##ed",
"wa",
"un",
"runn",
"##ing",
",",
"low",
"lowest",
]
self.vocab_file = os.path.join(self.tmpdirname, VOCAB_FILES_NAMES["vocab_file"])
with open(self.vocab_file, "w", encoding="utf-8") as vocab_writer:
vocab_writer.write("".join([x + "\n" for x in vocab_tokens]))
def get_tokenizer(self, **kwargs):
return FunnelTokenizer.from_pretrained(self.tmpdirname, **kwargs)
def get_rust_tokenizer(self, **kwargs):
return FunnelTokenizerFast.from_pretrained(self.tmpdirname, **kwargs)
def get_input_output_texts(self, tokenizer):
input_text = "UNwant\u00E9d,running"
output_text = "unwanted, running"
return input_text, output_text
def test_full_tokenizer(self):
tokenizer = self.tokenizer_class(self.vocab_file)
tokens = tokenizer.tokenize("UNwant\u00E9d,running")
self.assertListEqual(tokens, ["un", "##want", "##ed", ",", "runn", "##ing"])
self.assertListEqual(tokenizer.convert_tokens_to_ids(tokens), [7, 4, 5, 10, 8, 9])
def test_token_type_ids(self):
tokenizers = self.get_tokenizers(do_lower_case=False)
for tokenizer in tokenizers:
inputs = tokenizer("UNwant\u00E9d,running")
sentence_len = len(inputs["input_ids"]) - 1
self.assertListEqual(inputs["token_type_ids"], [2] + [0] * sentence_len)
inputs = tokenizer("UNwant\u00E9d,running", "UNwant\u00E9d,running")
self.assertListEqual(inputs["token_type_ids"], [2] + [0] * sentence_len + [1] * sentence_len)
utils/check_repo.py
View file @ d155b38d
......@@ -141,15 +141,17 @@ def get_model_doc_files():
# for the all_model_classes variable.
def find_tested_models(test_file):
""" Parse the content of test_file to detect what's in all_model_classes"""
# This is a bit hacky but I didn't find a way to import the test_file as a module and read inside the class
with open(os.path.join(PATH_TO_TESTS, test_file)) as f:
content = f.read()
all_models = re.search(r"all_model_classes\s+=\s+\(\s*\(([^\)]*)\)", content)
all_models = re.findall(r"all_model_classes\s+=\s+\(\s*\(([^\)]*)\)", content)
# Check with one less parenthesis
if all_models is None:
all_models = re.search(r"all_model_classes\s+=\s+\(([^\)]*)\)", content)
if all_models is not None:
if len(all_models) == 0:
all_models = re.findall(r"all_model_classes\s+=\s+\(([^\)]*)\)", content)
if len(all_models) > 0:
model_tested = []
for line in all_models.groups()[0].split(","):
for entry in all_models:
for line in entry.split(","):
name = line.strip()
if len(name) > 0:
model_tested.append(name)
......
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