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51 lines
2.1 KiB
51 lines
2.1 KiB
2 days ago
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import functools, multiprocessing
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from transformers import AutoTokenizer
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from datasets import load_dataset
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from tinygrad.apps.llm import SimpleTokenizer
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from tinygrad.helpers import tqdm, getenv, partition
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@functools.cache
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def get_tokenizers():
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print("getting tokenizers")
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base_tokenizer = AutoTokenizer.from_pretrained("NousResearch/Meta-Llama-3-8B-Instruct")
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special_tokens, normal_tokens = partition(((t, tid) for t, tid in base_tokenizer.vocab.items()), lambda e: e[1] in base_tokenizer.all_special_ids)
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simple_tokenizer = SimpleTokenizer(dict(normal_tokens), dict(special_tokens))
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return base_tokenizer, simple_tokenizer
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def test_tokenize(samp) -> bool:
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base_tokenizer, simple_tokenizer = get_tokenizers()
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idx, txt = samp
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try: simple_tokens = tuple(simple_tokenizer.encode(txt))
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except RuntimeError: simple_tokens = ()
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base_tokens = tuple(base_tokenizer.encode(txt, add_special_tokens=False))
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if simple_tokens != base_tokens:
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print(f"tokens mismatch at index: {idx}.\n")
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color_codes = [91, 92, 94, 93, 95]
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def color_tokens(tids):
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return "".join(f"\033[{color_codes[i%len(color_codes)]}m{base_tokenizer.decode([t])}" for i, t in enumerate(tids)) + "\033[0m"
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print("simple: ", color_tokens(simple_tokens))
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print("official:", color_tokens(base_tokens) + "\n")
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return False
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if simple_tokenizer.decode(simple_tokens) != txt:
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print(f"decode mismatch at {idx}")
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return False
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return True
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# use ALLOW_FAILED=-1 to go over the entire dataset without printing.
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if __name__ == "__main__":
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print("loading datasets")
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ds = load_dataset("OpenAssistant/oasst1")
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loaded_ds = [(idx, el["text"]) for idx, el in enumerate(ds["train"])]
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print(f"loaded {len(loaded_ds)}")
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allow_failed = getenv("ALLOW_FAILED", 10)
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fail_count, total = 0, 0
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with multiprocessing.Pool(16) as pool:
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for good in tqdm(pool.imap_unordered(test_tokenize, loaded_ds), total=len(loaded_ds)):
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total += 1
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if not good:
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fail_count += 1
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allow_failed -= 1
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if allow_failed == 0: break
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print(f"{fail_count}/{total} samples are inconsistent with the official tokenizer.")
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