from layoutlm import LayoutlmConfig, LayoutlmForTokenClassification from transformers import BertTokenizer,AdamW from torch.utils.data import DataLoader, RandomSampler import torch from tqdm import tqdm, trange MODEL_CLASSES = { "layoutlm": (LayoutlmConfig, LayoutlmForTokenClassification, BertTokenizer), } def train( train_dataset, model, tokenizer, labels, pad_token_label_id): """ Train the model """ if torch.cuda.is_available(): device = torch.device("cuda") print("GPU is available") else: device = torch.device("cpu") print("GPU is not available, using CPU instead") train_sampler = RandomSampler(train_dataset) train_dataloader = DataLoader(train_dataset, sampler=train_sampler, batch_size=args.train_batch_size, collate_fn=None ) no_decay = ["bias", "LayerNorm.weight"] optimizer = AdamW( lr=learning_rate, eps=adam_epsilon) model = torch.nn.Module(model, find_unused_parameters=True) global_step, tr_loss = 0, 0.0 model.zero_grad() train_iterator = trange(num_train_epochs, desc="Epoch") for in trainiterator: epoch_iterator = tqdm(train_dataloader, desc="Iteration") for step, batch in enumerate(epoch_iterator): model.train() inputs = {"input_ids": batch[0].to(device), "attention_mask": batch[1].to(device), "labels": batch[3].to(device)} inputs["bbox"] = batch[4].to(device) inputs["token_type_ids"] = batch[2].to(device) outputs = model(**inputs) loss = outputs[0] loss.backward() tr_loss += loss.item() optimizer.step() # scheduler.step() # Update learning rate schedule model.zero_grad() global_step += 1 return global_step, tr_loss / global_step
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