NLP简介

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HuggingFace简介

hugging face在NLP领域最出名，其提供的模型大多都是基于Transformer的。为了易用性，Hugging Face还为用户提供了以下几个项目：

Transformers(github, 官方文档): Transformers提供了上千个预训练好的模型可以用于不同的任务，例如文本领域、音频领域和CV领域。该项目是HuggingFace的核心，可以说学习HuggingFace就是在学习该项目如何使用。
Datasets(github, 官方文档): 一个轻量级的数据集框架，主要有两个功能：①一行代码下载和预处理常用的公开数据集； ② 快速、易用的数据预处理类库。
Accelerate(github, 官方文档): 帮助Pytorch用户很方便的实现 multi-GPU/TPU/fp16。
Space：Space提供了许多好玩的深度学习应用，可以尝试玩一下。

Transformers

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1. Pipeline流水线

将数据预处理tokenizer、模型调用model、结果后处理组装成一个流水线

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Pipeline原理

pipeline(data, model, tokenizer, divece)的原理:

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Pipeline使用方法

一般使用较多的方法是分别构建model和tokenizer，并指定task任务类型将其分别加入pipeline：
（每类pipeline的具体使用方法可以点进具体Pipeline类的源码中查看！！）
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Pipeline的Task类型

audio-classification {‘impl’: <class ‘transformers.pipelines.audio_classification.AudioClassificationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForAudioClassification’>,), ‘default’: {‘model’: {‘pt’: (‘superb/wav2vec2-base-superb-ks’, ‘372e048’)}}, ‘type’: ‘audio’}
automatic-speech-recognition {‘impl’: <class ‘transformers.pipelines.automatic_speech_recognition.AutomaticSpeechRecognitionPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForCTC’>, <class ‘transformers.models.auto.modeling_auto.AutoModelForSpeechSeq2Seq’>), ‘default’: {‘model’: {‘pt’: (‘facebook/wav2vec2-base-960h’, ‘55bb623’)}}, ‘type’: ‘multimodal’}
feature-extraction {‘impl’: <class ‘transformers.pipelines.feature_extraction.FeatureExtractionPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModel’>,), ‘default’: {‘model’: {‘pt’: (‘distilbert-base-cased’, ‘935ac13’), ‘tf’: (‘distilbert-base-cased’, ‘935ac13’)}}, ‘type’: ‘multimodal’}
text-classification {‘impl’: <class ‘transformers.pipelines.text_classification.TextClassificationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForSequenceClassification’>,), ‘default’: {‘model’: {‘pt’: (‘distilbert-base-uncased-finetuned-sst-2-english’, ‘af0f99b’), ‘tf’: (‘distilbert-base-uncased-finetuned-sst-2-english’, ‘af0f99b’)}}, ‘type’: ‘text’}
token-classification {‘impl’: <class ‘transformers.pipelines.token_classification.TokenClassificationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForTokenClassification’>,), ‘default’: {‘model’: {‘pt’: (‘dbmdz/bert-large-cased-finetuned-conll03-english’, ‘f2482bf’), ‘tf’: (‘dbmdz/bert-large-cased-finetuned-conll03-english’, ‘f2482bf’)}}, ‘type’: ‘text’}
question-answering {‘impl’: <class ‘transformers.pipelines.question_answering.QuestionAnsweringPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForQuestionAnswering’>,), ‘default’: {‘model’: {‘pt’: (‘distilbert-base-cased-distilled-squad’, ‘626af31’), ‘tf’: (‘distilbert-base-cased-distilled-squad’, ‘626af31’)}}, ‘type’: ‘text’}
table-question-answering {‘impl’: <class ‘transformers.pipelines.table_question_answering.TableQuestionAnsweringPipeline’>, ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForTableQuestionAnswering’>,), ‘tf’: (), ‘default’: {‘model’: {‘pt’: (‘google/tapas-base-finetuned-wtq’, ‘69ceee2’), ‘tf’: (‘google/tapas-base-finetuned-wtq’, ‘69ceee2’)}}, ‘type’: ‘text’}
visual-question-answering {‘impl’: <class ‘transformers.pipelines.visual_question_answering.VisualQuestionAnsweringPipeline’>, ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForVisualQuestionAnswering’>,), ‘tf’: (), ‘default’: {‘model’: {‘pt’: (‘dandelin/vilt-b32-finetuned-vqa’, ‘4355f59’)}}, ‘type’: ‘multimodal’}
document-question-answering {‘impl’: <class ‘transformers.pipelines.document_question_answering.DocumentQuestionAnsweringPipeline’>, ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForDocumentQuestionAnswering’>,), ‘tf’: (), ‘default’: {‘model’: {‘pt’: (‘impira/layoutlm-document-qa’, ‘52e01b3’)}}, ‘type’: ‘multimodal’}
fill-mask {‘impl’: <class ‘transformers.pipelines.fill_mask.FillMaskPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForMaskedLM’>,), ‘default’: {‘model’: {‘pt’: (‘distilroberta-base’, ‘ec58a5b’), ‘tf’: (‘distilroberta-base’, ‘ec58a5b’)}}, ‘type’: ‘text’}
summarization {‘impl’: <class ‘transformers.pipelines.text2text_generation.SummarizationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForSeq2SeqLM’>,), ‘default’: {‘model’: {‘pt’: (‘sshleifer/distilbart-cnn-12-6’, ‘a4f8f3e’), ‘tf’: (‘t5-small’, ‘d769bba’)}}, ‘type’: ‘text’}
translation {‘impl’: <class ‘transformers.pipelines.text2text_generation.TranslationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForSeq2SeqLM’>,), ‘default’: {(‘en’, ‘fr’): {‘model’: {‘pt’: (‘t5-base’, ‘686f1db’), ‘tf’: (‘t5-base’, ‘686f1db’)}}, (‘en’, ‘de’): {‘model’: {‘pt’: (‘t5-base’, ‘686f1db’), ‘tf’: (‘t5-base’, ‘686f1db’)}}, (‘en’, ‘ro’): {‘model’: {‘pt’: (‘t5-base’, ‘686f1db’), ‘tf’: (‘t5-base’, ‘686f1db’)}}}, ‘type’: ‘text’}
text2text-generation {‘impl’: <class ‘transformers.pipelines.text2text_generation.Text2TextGenerationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForSeq2SeqLM’>,), ‘default’: {‘model’: {‘pt’: (‘t5-base’, ‘686f1db’), ‘tf’: (‘t5-base’, ‘686f1db’)}}, ‘type’: ‘text’}
text-generation {‘impl’: <class ‘transformers.pipelines.text_generation.TextGenerationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForCausalLM’>,), ‘default’: {‘model’: {‘pt’: (‘gpt2’, ‘6c0e608’), ‘tf’: (‘gpt2’, ‘6c0e608’)}}, ‘type’: ‘text’}
zero-shot-classification {‘impl’: <class ‘transformers.pipelines.zero_shot_classification.ZeroShotClassificationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForSequenceClassification’>,), ‘default’: {‘model’: {‘pt’: (‘facebook/bart-large-mnli’, ‘c626438’), ‘tf’: (‘roberta-large-mnli’, ‘130fb28’)}, ‘config’: {‘pt’: (‘facebook/bart-large-mnli’, ‘c626438’), ‘tf’: (‘roberta-large-mnli’, ‘130fb28’)}}, ‘type’: ‘text’}
zero-shot-image-classification {‘impl’: <class ‘transformers.pipelines.zero_shot_image_classification.ZeroShotImageClassificationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForZeroShotImageClassification’>,), ‘default’: {‘model’: {‘pt’: (‘openai/clip-vit-base-patch32’, ‘f4881ba’), ‘tf’: (‘openai/clip-vit-base-patch32’, ‘f4881ba’)}}, ‘type’: ‘multimodal’}
zero-shot-audio-classification {‘impl’: <class ‘transformers.pipelines.zero_shot_audio_classification.ZeroShotAudioClassificationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModel’>,), ‘default’: {‘model’: {‘pt’: (‘laion/clap-htsat-fused’, ‘973b6e5’)}}, ‘type’: ‘multimodal’}
conversational {‘impl’: <class ‘transformers.pipelines.conversational.ConversationalPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForSeq2SeqLM’>, <class ‘transformers.models.auto.modeling_auto.AutoModelForCausalLM’>), ‘default’: {‘model’: {‘pt’: (‘microsoft/DialoGPT-medium’, ‘8bada3b’), ‘tf’: (‘microsoft/DialoGPT-medium’, ‘8bada3b’)}}, ‘type’: ‘text’}
image-classification {‘impl’: <class ‘transformers.pipelines.image_classification.ImageClassificationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForImageClassification’>,), ‘default’: {‘model’: {‘pt’: (‘google/vit-base-patch16-224’, ‘5dca96d’), ‘tf’: (‘google/vit-base-patch16-224’, ‘5dca96d’)}}, ‘type’: ‘image’}
image-segmentation {‘impl’: <class ‘transformers.pipelines.image_segmentation.ImageSegmentationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForImageSegmentation’>, <class ‘transformers.models.auto.modeling_auto.AutoModelForSemanticSegmentation’>), ‘default’: {‘model’: {‘pt’: (‘facebook/detr-resnet-50-panoptic’, ‘fc15262’)}}, ‘type’: ‘multimodal’}
image-to-text {‘impl’: <class ‘transformers.pipelines.image_to_text.ImageToTextPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForVision2Seq’>,), ‘default’: {‘model’: {‘pt’: (‘ydshieh/vit-gpt2-coco-en’, ‘65636df’), ‘tf’: (‘ydshieh/vit-gpt2-coco-en’, ‘65636df’)}}, ‘type’: ‘multimodal’}
object-detection {‘impl’: <class ‘transformers.pipelines.object_detection.ObjectDetectionPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForObjectDetection’>,), ‘default’: {‘model’: {‘pt’: (‘facebook/detr-resnet-50’, ‘2729413’)}}, ‘type’: ‘multimodal’}
zero-shot-object-detection {‘impl’: <class ‘transformers.pipelines.zero_shot_object_detection.ZeroShotObjectDetectionPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForZeroShotObjectDetection’>,), ‘default’: {‘model’: {‘pt’: (‘google/owlvit-base-patch32’, ‘17740e1’)}}, ‘type’: ‘multimodal’}
depth-estimation {‘impl’: <class ‘transformers.pipelines.depth_estimation.DepthEstimationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForDepthEstimation’>,), ‘default’: {‘model’: {‘pt’: (‘Intel/dpt-large’, ‘e93beec’)}}, ‘type’: ‘image’}
video-classification {‘impl’: <class ‘transformers.pipelines.video_classification.VideoClassificationPipeline’>, ‘tf’: (), ‘pt’: (<class ‘transformers.models.auto.modeling_auto.AutoModelForVideoClassification’>,), ‘default’: {‘model’: {‘pt’: (‘MCG-NJU/videomae-base-finetuned-kinetics’, ‘4800870’)}}, ‘type’: ‘video’}

2. Tokenizer分词器

Tokenizer将过去繁琐的text-to-token的过程进行简化：
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2.1 Tokenizer的使用方法

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Step1 加载与保存

from transformers import AutoTokenizer# 从HuggingFace加载，输入模型名称，即可加载对应的分词器
tokenizer = AutoTokenizer.from_pretrained("uer/roberta-base-finetuned-dianping-chinese")
"""
BertTokenizerFast(name_or_path='uer/roberta-base-finetuned-dianping-chinese', vocab_size=21128, model_max_length=1000000000000000019884624838656, is_fast=True, padding_side='right', truncation_side='right', special_tokens={'unk_token': '[UNK]', 'sep_token': '[SEP]', 'pad_token': '[PAD]', 'cls_token': '[CLS]', 'mask_token': '[MASK]'}, clean_up_tokenization_spaces=True)
"""

# tokenizer 保存到本地
tokenizer.save_pretrained("本地文件夹路径")
''' 文件夹内的文件格式
('./roberta_tokenizer\\tokenizer_config.json','./roberta_tokenizer\\special_tokens_map.json','./roberta_tokenizer\\vocab.txt','./roberta_tokenizer\\added_tokens.json','./roberta_tokenizer\\tokenizer.json')
'''

# 从本地加载tokenizer
tokenizer = AutoTokenizer.from_pretrained("本地文件夹路径")
"""
BertTokenizerFast(name_or_path='uer/roberta-base-finetuned-dianping-chinese', vocab_size=21128, model_max_length=1000000000000000019884624838656, is_fast=True, padding_side='right', truncation_side='right', special_tokens={'unk_token': '[UNK]', 'sep_token': '[SEP]', 'pad_token': '[PAD]', 'cls_token': '[CLS]', 'mask_token': '[MASK]'}, clean_up_tokenization_spaces=True)
"""

Step2 句子分词 :

sen = "弱小的我也有大梦想!"
tokens = tokenizer.tokenize(sen)
# ['弱', '小', '的', '我', '也', '有', '大', '梦', '想', '!']

Step3 查看词典:

tokenizer.vocab
"""
{'湾': 3968,'訴': 6260,'##轶': 19824,'洞': 3822,'￣': 8100,'##劾': 14288,'##care': 11014,'asia': 8339,'##嗑': 14679,'##鹘': 20965,'washington': 12262,'##匕': 14321,'##樟': 16619,'癮': 4628,'day3': 11649,'##宵': 15213,'##弧': 15536,'##do': 8828,'詭': 6279,'3500': 9252,'124': 9377,'##価': 13957,'##玄': 17428,'##積': 18005,'##肝': 18555,
...'##维': 18392,'與': 5645,'##mark': 9882,'偽': 984,...}
"""

tokenizer.vocab_size
# 21128

Step4 索引转换:

# 将词序列转换为id序列
ids = tokenizer.convert_tokens_to_ids(tokens)
ids
# [2483, 2207, 4638, 2769, 738, 3300, 1920, 3457, 2682, 106]

# 将id序列转换为token序列
tokens = tokenizer.convert_ids_to_tokens(ids)
tokens
# ['弱', '小', '的', '我', '也', '有', '大', '梦', '想', '!']

# 将token序列转换为string
str_sen = tokenizer.convert_tokens_to_string(tokens)
str_sen
# '弱 小 的 我 也 有 大 梦 想!'

总结——更便捷的实现方式：

# 将字符串转换为id序列，又称之为编码
ids = tokenizer.encode(sen, add_special_tokens=True)
ids
# [101, 2483, 2207, 4638, 2769, 738, 3300, 1920, 3457, 2682, 106, 102]

# 将id序列转换为字符串，又称之为解码
str_sen = tokenizer.decode(ids, skip_special_tokens=False)
str_sen
# '[CLS] 弱 小 的 我 也 有 大 梦 想! [SEP]'

Step5 填充与截断：

# 填充
ids = tokenizer.encode(sen, padding="max_length", max_length=15)
ids
# [101, 2483, 2207, 4638, 2769, 738, 3300, 1920, 3457, 2682, 106, 102, 0, 0, 0]

# 截断
ids = tokenizer.encode(sen, max_length=5, truncation=True)
ids
# [101, 2483, 2207, 4638, 102]

Step6 其他输入部分：

ids = tokenizer.encode(sen, padding="max_length", max_length=15)
ids
# [101, 2483, 2207, 4638, 2769, 738, 3300, 1920, 3457, 2682, 106, 102, 0, 0, 0]

attention_mask = [1 if idx != 0 else 0 for idx in ids]
token_type_ids = [0] * len(ids)
ids, attention_mask, token_type_ids
"""
([101, 2483, 2207, 4638, 2769, 738, 3300, 1920, 3457, 2682, 106, 102, 0, 0, 0],[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0],[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
"""

2.2 Tokenizer快速调用

tokenizer.encode_plus()和tokenizer()效果相同

inputs = tokenizer.encode_plus(sen, padding="max_length", max_length=15)
inputs
"""
{'input_ids': [101, 2483, 2207, 4638, 2769, 738, 3300, 1920, 3457, 2682, 106, 102, 0, 0, 0], 
'token_type_ids': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 
'attention_mask': [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0]}
"""

inputs = tokenizer(sen, padding="max_length", max_length=15)
inputs
"""
{'input_ids': [101, 2483, 2207, 4638, 2769, 738, 3300, 1920, 3457, 2682, 106, 102, 0, 0, 0], 
'token_type_ids': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 
'attention_mask': [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0]}
"""

2.3 处理batch数据

sens = ["弱小的我也有大梦想","有梦想谁都了不起","追逐梦想的心，比梦想本身，更可贵"]
res = tokenizer(sens)
res
"""
{'input_ids': [[101, 2483, 2207, 4638, 2769, 738, 3300, 1920, 3457, 2682, 102], [101, 3300, 3457, 2682, 6443, 6963, 749, 679, 6629, 102], [101, 6841, 6852, 3457, 2682, 4638, 2552, 8024, 3683, 3457, 2682, 3315, 6716, 8024, 3291, 1377, 6586, 102]], 
'token_type_ids': [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]], 
'attention_mask': [[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]]}
"""

%%time
# 单条循环处理
for i in range(1000):tokenizer(sen)
# CPU times: total: 15.6 ms
# Wall time: 32.5 ms%%time
# 处理batch数据
sen_list = [sen] * 1000
res = tokenizer(sen_list)
# CPU times: total: 0 ns
# Wall time: 6 ms

2.4 Fast / Slow Tokenizer

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sen = "弱小的我也有大Dreaming!"
fast_tokenizer = AutoTokenizer.from_pretrained("uer/roberta-base-finetuned-dianping-chinese")
fast_tokenizer
# BertTokenizerFast(name_or_path='uer/roberta-base-finetuned-dianping-chinese', vocab_size=21128, model_max_length=1000000000000000019884624838656, is_fast=True, padding_side='right', truncation_side='right', special_tokens={'unk_token': '[UNK]', 'sep_token': '[SEP]', 'pad_token': '[PAD]', 'cls_token': '[CLS]', 'mask_token': '[MASK]'}, clean_up_tokenization_spaces=True)inputs = fast_tokenizer(sen, return_offsets_mapping=True)
inputs
# {'input_ids': [101, 2483, 2207, 4638, 2769, 738, 3300, 1920, 10252, 8221, 106, 102], 'token_type_ids': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 'attention_mask': [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], 'offset_mapping': [(0, 0), (0, 1), (1, 2), (2, 3), (3, 4), (4, 5), (5, 6), (6, 7), (7, 12), (12, 15), (15, 16), (0, 0)]}inputs.word_ids()
# [None, 0, 1, 2, 3, 4, 5, 6, 7, 7, 8, None]

slow_tokenizer = AutoTokenizer.from_pretrained("uer/roberta-base-finetuned-dianping-chinese", use_fast=False)
slow_tokenizer
# BertTokenizer(name_or_path='uer/roberta-base-finetuned-dianping-chinese', vocab_size=21128, model_max_length=1000000000000000019884624838656, is_fast=False, padding_side='right', truncation_side='right', special_tokens={'unk_token': '[UNK]', 'sep_token': '[SEP]', 'pad_token': '[PAD]', 'cls_token': '[CLS]', 'mask_token': '[MASK]'}, clean_up_tokenization_spaces=True)

3. Model模型

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3.1 模型加载与保存

在线下载： 会遇到HTTP连接超时

from transformers import AutoConfig, AutoModel, AutoTokenizer
model = AutoModel.from_pretrained("hfl/rbt3", force_download=True)

离线下载： 需要挂梯子自己进去下载，在本地创建文件夹

!git clone "https://huggingface.co/hfl/rbt3"
!git lfs clone "https://huggingface.co/hfl/rbt3" --include="*.bin"

离线加载：

model = AutoModel.from_pretrained("本地文件夹")

模型加载参数

model = AutoModel.from_pretrained("本地文件夹")
model.config
"""
BertConfig {"_name_or_path": "rbt3","architectures": ["BertForMaskedLM"],"attention_probs_dropout_prob": 0.1,"classifier_dropout": null,"directionality": "bidi","hidden_act": "gelu","hidden_dropout_prob": 0.1,"hidden_size": 768,"initializer_range": 0.02,"intermediate_size": 3072,"layer_norm_eps": 1e-12,"max_position_embeddings": 512,"model_type": "bert","num_attention_heads": 12,"num_hidden_layers": 3,"output_past": true,"pad_token_id": 0,"pooler_fc_size": 768,"pooler_num_attention_heads": 12,"pooler_num_fc_layers": 3,"pooler_size_per_head": 128,"pooler_type": "first_token_transform",
..."transformers_version": "4.28.1","type_vocab_size": 2,"use_cache": true,"vocab_size": 21128
}
"""

config = AutoConfig.from_pretrained("./rbt3/")
config
"""
BertConfig {"_name_or_path": "rbt3","architectures": ["BertForMaskedLM"],"attention_probs_dropout_prob": 0.1,"classifier_dropout": null,"directionality": "bidi","hidden_act": "gelu","hidden_dropout_prob": 0.1,"hidden_size": 768,"initializer_range": 0.02,"intermediate_size": 3072,"layer_norm_eps": 1e-12,"max_position_embeddings": 512,"model_type": "bert","num_attention_heads": 12,"num_hidden_layers": 3,"output_past": true,"pad_token_id": 0,"pooler_fc_size": 768,"pooler_num_attention_heads": 12,"pooler_num_fc_layers": 3,"pooler_size_per_head": 128,"pooler_type": "first_token_transform",
..."transformers_version": "4.28.1","type_vocab_size": 2,"use_cache": true,"vocab_size": 21128
}
"""

3.2 模型调用

sen = "弱小的我也有大梦想！"
tokenizer = AutoTokenizer.from_pretrained("rbt3")
inputs = tokenizer(sen, return_tensors="pt")
inputs
"""
{'input_ids': tensor([[ 101, 2483, 2207, 4638, 2769,  738, 3300, 1920, 3457, 2682, 8013,  102]]), 'token_type_ids': tensor([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]]), 'attention_mask': tensor([[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]])}
"""

不带Model Head的模型调用

model = AutoModel.from_pretrained("rbt3", output_attentions=True)
output = model(**inputs)
output
"""
BaseModelOutputWithPoolingAndCrossAttentions(last_hidden_state=tensor([[[ 0.6804,  0.6664,  0.7170,  ..., -0.4102,  0.7839, -0.0262],[-0.7378, -0.2748,  0.5034,  ..., -0.1359, -0.4331, -0.5874],[-0.0212,  0.5642,  0.1032,  ..., -0.3617,  0.4646, -0.4747],...,[ 0.0853,  0.6679, -0.1757,  ..., -0.0942,  0.4664,  0.2925],[ 0.3336,  0.3224, -0.3355,  ..., -0.3262,  0.2532, -0.2507],[ 0.6761,  0.6688,  0.7154,  ..., -0.4083,  0.7824, -0.0224]]],grad_fn=<NativeLayerNormBackward0>), pooler_output=tensor([[-1.2646e-01, -9.8619e-01, -1.0000e+00, -9.8325e-01,  8.0238e-01,-6.6268e-02,  6.6919e-02,  1.4784e-01,  9.9451e-01,  9.9995e-01,-8.3051e-02, -1.0000e+00, -9.8865e-02,  9.9980e-01, -1.0000e+00,9.9993e-01,  9.8291e-01,  9.5363e-01, -9.9948e-01, -1.3219e-01,-9.9733e-01, -7.7934e-01,  1.0720e-01,  9.8040e-01,  9.9953e-01,-9.9939e-01, -9.9997e-01,  1.4967e-01, -8.7627e-01, -9.9996e-01,-9.9821e-01, -9.9999e-01,  1.9396e-01, -1.1277e-01,  9.9359e-01,-9.9153e-01,  4.4752e-02, -9.8731e-01, -9.9942e-01, -9.9982e-01,2.9360e-02,  9.9847e-01, -9.2014e-03,  9.9999e-01,  1.7111e-01,4.5071e-03,  9.9998e-01,  9.9467e-01,  4.9726e-03, -9.0707e-01,6.9056e-02, -1.8141e-01, -9.8831e-01,  9.9668e-01,  4.9800e-01,1.2997e-01,  9.9895e-01, -1.0000e+00, -9.9990e-01,  9.9478e-01,-9.9989e-01,  9.9906e-01,  9.9820e-01,  9.9990e-01, -6.8953e-01,9.9990e-01,  9.9987e-01,  9.4563e-01, -3.7660e-01, -1.0000e+00,1.3151e-01, -9.7371e-01, -9.9997e-01, -1.3228e-02, -2.9801e-01,-9.9985e-01,  9.9662e-01, -2.0004e-01,  9.9997e-01,  3.6876e-01,-9.9997e-01,  1.5462e-01,  1.9265e-01,  8.9871e-02,  9.9996e-01,9.9998e-01,  1.5184e-01, -8.9714e-01, -2.1646e-01, -9.9922e-01,
...1.7911e-02, 4.8672e-01],[4.0732e-01, 3.8137e-02, 9.6832e-03,  ..., 4.4490e-02,2.2997e-02, 4.0793e-01],[1.7047e-01, 3.6989e-02, 2.3646e-02,  ..., 4.6833e-02,2.5233e-01, 1.6721e-01]]]], grad_fn=<SoftmaxBackward0>)), cross_attentions=None)
"""

output.last_hidden_state.size()
# orch.Size([1, 12, 768])
len(inputs["input_ids"][0])
# 12

带Model Head的模型调用

from transformers import AutoModelForSequenceClassification, BertForSequenceClassification
clz_model = AutoModelForSequenceClassification.from_pretrained("rbt3", num_labels=10)
clz_model(**inputs)
# SequenceClassifierOutput(loss=None, logits=tensor([[-0.1776,  0.2208, -0.5060, -0.3938, -0.5837,  1.0171, -0.2616,  0.0495, 0.1728,  0.3047]], grad_fn=<AddmmBackward0>), hidden_states=None, attentions=None)
clz_model.config.num_labels
# 2