Created
September 9, 2025 11:30
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cache tiktoken blobs
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| """An example of caching tiktoken data, so I can count tokens offline. | |
| """ | |
| import tiktoken | |
| import hashlib | |
| from pathlib import Path | |
| import shutil | |
| import os | |
| # from tiktoken_ext | |
| blobs = ( | |
| # uri (blobpath), expected hash (unrequired) | |
| ("https://openaipublic.blob.core.windows.net/encodings/r50k_base.tiktoken", | |
| "306cd27f03c1a714eca7108e03d66b7dc042abe8c258b44c199a7ed9838dd930",), | |
| ("https://openaipublic.blob.core.windows.net/encodings/p50k_base.tiktoken", | |
| "94b5ca7dff4d00767bc256fdd1b27e5b17361d7b8a5f968547f9f23eb70d2069",), | |
| ("https://openaipublic.blob.core.windows.net/encodings/p50k_base.tiktoken", | |
| "94b5ca7dff4d00767bc256fdd1b27e5b17361d7b8a5f968547f9f23eb70d2069",), | |
| ("https://openaipublic.blob.core.windows.net/encodings/cl100k_base.tiktoken", | |
| "223921b76ee99bde995b7ff738513eef100fb51d18c93597a113bcffe865b2a7",), | |
| ("https://openaipublic.blob.core.windows.net/encodings/o200k_base.tiktoken", | |
| "446a9538cb6c348e3516120d7c08b09f57c36495e2acfffe59a5bf8b0cfb1a2d",), | |
| ) | |
| DIR = Path("./tiktoken_cache").absolute() | |
| os.environ["TIKTOKEN_CACHE_DIR"] = str(DIR.absolute()) | |
| for blobpath, expected in blobs: | |
| cache_key = hashlib.sha1(blobpath.encode()).hexdigest() | |
| filename = Path(blobpath).name | |
| new_filename = cache_key | |
| shutil.copyfile(dir_path / filename, DIR / new_filename) | |
| print(filename, ': ', cache_key) | |
| def num_tokens_from_string(string: str, encoding_name: str) -> int: | |
| """Returns the number of tokens in a text string.""" | |
| encoding = tiktoken.get_encoding(encoding_name) | |
| num_tokens = len(encoding.encode(string)) | |
| return num_tokens |
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