211 lines
7.4 KiB
Python
211 lines
7.4 KiB
Python
import os
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import torch
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import torch.nn as nn
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from transformers import AutoTokenizer, AutoModelForCausalLM, TrainingArguments, Trainer
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from datasets import Dataset
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from PIL import Image
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import re
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import pytesseract
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import docx2txt
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import PyPDF2
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import json
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from collections import defaultdict
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from huggingface_hub import login
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login(token="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")
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os.environ["TOKENIZERS_PARALLELISM"] = "false"
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class SourceMapper:
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def __init__(self):
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self.source_to_idx = defaultdict(lambda: len(self.source_to_idx))
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self.idx_to_source = {}
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def add_source(self, source):
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if source and source not in self.source_to_idx:
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idx = self.source_to_idx[source]
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self.idx_to_source[idx] = source
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def get_idx(self, source):
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return self.source_to_idx[source] if source else -1
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def get_source(self, idx):
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return self.idx_to_source.get(idx, "Unknown")
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def load_file_catalog(catalog_path):
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with open(catalog_path, 'r', encoding='utf-8') as file:
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return json.load(file)
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def identify_legal_document(filename, file_catalog):
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return file_catalog.get(filename, "Opracowanie własne")
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def extract_text_from_file(file_path):
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_, ext = os.path.splitext(file_path)
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ext = ext.lower()
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if ext in ['.txt', '.md']:
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with open(file_path, 'r', encoding='utf-8') as file:
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return file.read()
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elif ext == '.pdf':
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text = ""
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with open(file_path, 'rb') as file:
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reader = PyPDF2.PdfReader(file)
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for page in reader.pages:
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text += page.extract_text()
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return text
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elif ext in ['.doc', '.docx']:
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return docx2txt.process(file_path)
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elif ext in ['.jpg', '.jpeg', '.png', '.bmp', '.tiff']:
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return pytesseract.image_to_string(Image.open(file_path))
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else:
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return ""
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def prepare_dataset(directory, catalog_path, source_mapper):
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file_catalog = load_file_catalog(catalog_path)
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data = []
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for root, _, files in os.walk(directory):
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for file in files:
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file_path = os.path.join(root, file)
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text = extract_text_from_file(file_path)
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if not text:
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continue
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doc_type = identify_legal_document(file, file_catalog)
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if doc_type != "Opracowanie własne":
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articles = re.split(r'(Art\.\s+\d+[\.\s])', text)
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for i in range(1, len(articles), 2):
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article_number = articles[i].strip()
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article_content = articles[i+1].strip() if i+1 < len(articles) else ""
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source = f"{doc_type}, {article_number}"
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source_mapper.add_source(source)
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data.append({
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"text": f"{article_number} {article_content}",
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"source_idx": source_mapper.get_idx(source)
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})
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else:
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chunks = [text[i:i+512] for i in range(0, len(text), 512)]
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for chunk in chunks:
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data.append({
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"text": chunk,
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"source_idx": -1 # Brak źródła
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})
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return data
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def tokenize_function(examples):
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tokenized = tokenizer(
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examples["text"],
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truncation=True,
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padding="max_length",
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max_length=512,
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return_tensors="pt"
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)
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tokenized["labels"] = tokenized["input_ids"].clone()
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tokenized["source_idx"] = examples["source_idx"]
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return tokenized
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def custom_collate_fn(batch):
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input_ids = torch.stack([torch.tensor(b["input_ids"]) for b in batch])
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attention_mask = torch.stack([torch.tensor(b["attention_mask"]) for b in batch])
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labels = torch.stack([torch.tensor(b["labels"]) for b in batch])
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source_idx = torch.tensor([b.get("source_idx", -1) for b in batch], dtype=torch.long)
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print("source_idx shape:", source_idx.shape) # Debugowanie
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return {"input_ids": input_ids, "attention_mask": attention_mask, "labels": labels, "source_idx": source_idx}
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class CustomModel(nn.Module):
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def __init__(self, model_name, config):
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super().__init__()
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self.base_model = AutoModelForCausalLM.from_pretrained(model_name, config=config)
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self.source_embedding = nn.Embedding(
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num_embeddings=1000,
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embedding_dim=config.hidden_size,
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padding_idx=-1
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)
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def forward(self, input_ids=None, attention_mask=None, labels=None, source_idx=None, **kwargs):
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if source_idx is not None:
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source_embeds = self.source_embedding(source_idx).unsqueeze(1).expand(-1, input_ids.size(1), -1)
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# Dodaj embeddingi źródła do wejścia modelu
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hidden_states = self.base_model.get_input_embeddings()(input_ids) + source_embeds
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outputs = self.base_model(inputs_embeds=hidden_states, attention_mask=attention_mask, labels=labels, **kwargs)
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else:
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outputs = self.base_model(input_ids=input_ids, attention_mask=attention_mask, labels=labels, **kwargs)
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return outputs
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class CustomTrainer(Trainer):
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def compute_loss(self, model, inputs, return_outputs=False, **kwargs):
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labels = inputs.pop("labels")
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source_idx = inputs.pop("source_idx", None)
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outputs = model(**inputs, labels=labels, source_idx=source_idx)
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loss = outputs.loss
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return (loss, outputs) if return_outputs else loss
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# Inicjalizacja komponentów
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source_mapper = SourceMapper()
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model_name = "crumb/nano-mistral"
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tokenizer = AutoTokenizer.from_pretrained(model_name)
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tokenizer.pad_token = tokenizer.eos_token
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# Przygotowanie danych
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catalog_path = "file_catalog.json"
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data = prepare_dataset("files", catalog_path, source_mapper)
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dataset = Dataset.from_list(data)
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tokenized_dataset = dataset.map(tokenize_function, batched=True, batch_size=8)
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# Inicjalizacja modelu
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config = AutoModelForCausalLM.from_pretrained(model_name).config
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print("Vocabulary size:", config.vocab_size)
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model = CustomModel(model_name, config)
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model.to("cpu")
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# Konfiguracja treningu
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training_args = TrainingArguments(
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output_dir="./results",
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num_train_epochs=3,
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per_device_train_batch_size=2,
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gradient_accumulation_steps=4,
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learning_rate=2e-5,
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fp16=True,
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logging_steps=1,
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logging_dir="./logs",
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save_strategy="steps",
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save_steps=1000,
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)
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# Trening
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trainer = CustomTrainer(
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model=model,
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args=training_args,
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train_dataset=tokenized_dataset,
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data_collator=custom_collate_fn,
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)
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trainer.train()
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# Funkcja generująca odpowiedź
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def generate_answer(question, model, tokenizer, source_mapper, max_length=200):
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inputs = tokenizer(question, return_tensors="pt", truncation=True, max_length=512)
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outputs = model.generate(
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**inputs,
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max_length=max_length,
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num_return_sequences=1,
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return_dict_in_generate=True,
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output_scores=True,
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)
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answer = tokenizer.decode(outputs.sequences[0], skip_special_tokens=True)
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# Pobierz źródło z ostatniego tokena
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last_token_id = outputs.sequences[0][-1].item()
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source_idx = model.source_embedding.weight.shape[0] - 1 # Tymczasowe rozwiązanie
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source = source_mapper.get_source(source_idx)
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return f"{answer}\n\nŹródło: {source if source else 'Opracowanie własne'}"
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# Przykład użycia
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question = "Ile dni urlopu przysługuje pracownikowi?"
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answer = generate_answer(question, model, tokenizer, source_mapper)
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print(answer)
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