Delete train.py
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train.py
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from datasets import load_dataset
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from transformers import GPT2Tokenizer, GPT2LMHeadModel, Trainer, TrainingArguments, DataCollatorForLanguageModeling
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# Load small dataset
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dataset = load_dataset("wikitext", "wikitext-2-raw-v1")
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# Load pretrained GPT2 tiny
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tokenizer = GPT2Tokenizer.from_pretrained("gpt2")
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tokenizer.pad_token = tokenizer.eos_token
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model = GPT2LMHeadModel.from_pretrained("gpt2")
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# Tokenize
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def tokenize(examples):
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return tokenizer(examples['text'], truncation=True, max_length=128, padding="max_length")
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tokenized = dataset.map(tokenize, batched=True)
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tokenized.set_format(type="torch", columns=["input_ids"])
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# Data collator
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data_collator = DataCollatorForLanguageModeling(tokenizer=tokenizer, mlm=False)
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# Training arguments
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training_args = TrainingArguments(
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output_dir="./tiny-gpt",
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per_device_train_batch_size=2,
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num_train_epochs=1, # keep it 1 for speed
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logging_steps=50,
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save_steps=200,
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save_total_limit=1,
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learning_rate=5e-4
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)
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trainer = Trainer(
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model=model,
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args=training_args,
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train_dataset=tokenized['train'],
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tokenizer=tokenizer,
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data_collator=data_collator
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)
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trainer.train()
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model.save_pretrained("./tiny-gpt")
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tokenizer.save_pretrained("./tiny-gpt")
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print("Training complete!")
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