ISI-transformers/transformers2.ipynb

Wizualizacja atencji

https://github.com/jessevig/bertviz

!pip install bertviz

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from transformers import AutoTokenizer, AutoModel
from bertviz import model_view, head_view

TEXT = "This is a sample input sentence for a transformer model"

MODEL = "distilbert-base-uncased"

tokenizer = AutoTokenizer.from_pretrained(MODEL)
model = AutoModel.from_pretrained(MODEL, output_attentions=True)
inputs = tokenizer.encode(TEXT, return_tensors='pt')
outputs = model(inputs)
attention = outputs[-1]
tokens = tokenizer.convert_ids_to_tokens(inputs[0]) 

SELF ATTENTION MODELS

head_view(attention, tokens)

Layer:

model_view(attention, tokens)

ENCODER-DECODER MODELS

MODEL = "Helsinki-NLP/opus-mt-en-de"

TEXT_ENCODER = "She sees the small elephant."
TEXT_DECODER = "Sie sieht den kleinen Elefanten."

tokenizer = AutoTokenizer.from_pretrained(MODEL)
model = AutoModel.from_pretrained(MODEL, output_attentions=True)

encoder_input_ids = tokenizer(TEXT_ENCODER, return_tensors="pt", add_special_tokens=True).input_ids
decoder_input_ids = tokenizer(TEXT_DECODER, return_tensors="pt", add_special_tokens=True).input_ids

outputs = model(input_ids=encoder_input_ids, decoder_input_ids=decoder_input_ids)

encoder_text = tokenizer.convert_ids_to_tokens(encoder_input_ids[0])
decoder_text = tokenizer.convert_ids_to_tokens(decoder_input_ids[0])

head_view(
    encoder_attention=outputs.encoder_attentions,
    decoder_attention=outputs.decoder_attentions,
    cross_attention=outputs.cross_attentions,
    encoder_tokens= encoder_text,
    decoder_tokens = decoder_text
)

Layer: Attention: Encoder Decoder Cross

model_view(
    encoder_attention=outputs.encoder_attentions,
    decoder_attention=outputs.decoder_attentions,
    cross_attention=outputs.cross_attentions,
    encoder_tokens= encoder_text,
    decoder_tokens = decoder_text
)

Attention: Encoder Decoder Cross

Zadanie (10 minut)

Za pomocą modelu en-fr przetłumacz dowolne zdanie z angielskiego na język francuski i sprawdź wagi atencji dla tego tłumaczenia

PRZYKŁAD: GPT3

ZADANIE DOMOWE - POLEVAL