35 lines
1.3 KiB
Python
35 lines
1.3 KiB
Python
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from transformers import AutoTokenizer, AutoModel
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import torch
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import torch.nn.functional as F
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#Mean Pooling - Take attention mask into account for correct averaging
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def mean_pooling(model_output, attention_mask):
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token_embeddings = model_output[0] #First element of model_output contains all token embeddings
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input_mask_expanded = attention_mask.unsqueeze(-1).expand(token_embeddings.size()).float()
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return torch.sum(token_embeddings * input_mask_expanded, 1) / torch.clamp(input_mask_expanded.sum(1), min=1e-9)
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# Sentences we want sentence embeddings for
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sentences = ['This is an example sentence', 'Each sentence is converted']
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# Load model from HuggingFace Hub
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tokenizer = AutoTokenizer.from_pretrained('sentence-transformers/all-MiniLM-L6-v2')
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model = AutoModel.from_pretrained('sentence-transformers/all-MiniLM-L6-v2')
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# Tokenize sentences
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encoded_input = tokenizer(sentences, padding=True, truncation=True, return_tensors='pt')
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# Compute token embeddings
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with torch.no_grad():
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model_output = model(**encoded_input)
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# Perform pooling
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sentence_embeddings = mean_pooling(model_output, encoded_input['attention_mask'])
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# Normalize embeddings
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sentence_embeddings = F.normalize(sentence_embeddings, p=2, dim=1)
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print("Sentence embeddings:")
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print(sentence_embeddings)
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print(sentence_embeddings.cpu().numpy())
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