quickstart.py

import os
from trl import SFTTrainer
from datasets import load_dataset

dataset = load_dataset("trl-lib/Capybara", split="train")
os.environ["PYTORCH_CUDA_ALLOC_CONF"] = "expandable_segments:True"

trainer = SFTTrainer(
    model="Qwen/Qwen3-0.6B",
    train_dataset=dataset,
)
trainer.train()