40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
import torch
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from model.brain_architecture import TinyTransformer
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from model.brain_state import model, tokenizer, DEVICE
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optimizer = torch.optim.Adam(model.parameters(), lr=1e-4)
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_last_expansion_vocab_size = 0
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def get_optimizer():
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return optimizer
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def expand_model_if_needed():
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global model, optimizer, _last_expansion_vocab_size
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current_vocab_size = len(tokenizer.vocab) + 10
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if current_vocab_size - _last_expansion_vocab_size < 5:
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return # Only expand every 5 words
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old_vocab_size = model.head.out_features
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if current_vocab_size <= old_vocab_size:
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return # No expansion needed
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print(f"Expanding model from {old_vocab_size} -> {current_vocab_size}")
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old_state = model.state_dict()
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new_model = TinyTransformer(vocab_size=current_vocab_size).to(DEVICE)
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# Transfer matching parameters
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with torch.no_grad():
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for name, param in new_model.named_parameters():
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if name in old_state and old_state[name].shape == param.shape:
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param.copy_(old_state[name])
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model = new_model
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optimizer = torch.optim.Adam(model.parameters(), lr=1e-4)
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print("Expansion complete.")
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