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from tiktoken.load import data_gym_to_mergeable_bpe_ranks, load_tiktoken_bpe
ENDOFTEXT = "<|endoftext|>"
FIM_PREFIX = "<|fim_prefix|>"
FIM_MIDDLE = "<|fim_middle|>"
FIM_SUFFIX = "<|fim_suffix|>"
ENDOFPROMPT = "<|endofprompt|>"
# The pattern in the original GPT-2 release is:
# r"""'s|'t|'re|'ve|'m|'ll|'d| ?[\p{L}]+| ?[\p{N}]+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+"""
# This is equivalent, but executes faster:
r50k_pat_str = (
r"""'(?:[sdmt]|ll|ve|re)| ?\p{L}++| ?\p{N}++| ?[^\s\p{L}\p{N}]++|\s++$|\s+(?!\S)|\s"""
)
def gpt2():
mergeable_ranks = data_gym_to_mergeable_bpe_ranks(
vocab_bpe_file="https://openaipublic.blob.core.windows.net/gpt-2/encodings/main/vocab.bpe",
encoder_json_file="https://openaipublic.blob.core.windows.net/gpt-2/encodings/main/encoder.json",
vocab_bpe_hash="1ce1664773c50f3e0cc8842619a93edc4624525b728b188a9e0be33b7726adc5",
encoder_json_hash="196139668be63f3b5d6574427317ae82f612a97c5d1cdaf36ed2256dbf636783",
)
return {
"name": "gpt2",
"explicit_n_vocab": 50257,
"pat_str": r50k_pat_str,
"mergeable_ranks": mergeable_ranks,
"special_tokens": {ENDOFTEXT: 50256},
}
def r50k_base():
mergeable_ranks = load_tiktoken_bpe(
"https://openaipublic.blob.core.windows.net/encodings/r50k_base.tiktoken",
expected_hash="306cd27f03c1a714eca7108e03d66b7dc042abe8c258b44c199a7ed9838dd930",
)
return {
"name": "r50k_base",
"explicit_n_vocab": 50257,
"pat_str": r50k_pat_str,
"mergeable_ranks": mergeable_ranks,
"special_tokens": {ENDOFTEXT: 50256},
}
def p50k_base():
mergeable_ranks = load_tiktoken_bpe(
"https://openaipublic.blob.core.windows.net/encodings/p50k_base.tiktoken",
expected_hash="94b5ca7dff4d00767bc256fdd1b27e5b17361d7b8a5f968547f9f23eb70d2069",
)
return {
"name": "p50k_base",
"explicit_n_vocab": 50281,
"pat_str": r50k_pat_str,
"mergeable_ranks": mergeable_ranks,
"special_tokens": {ENDOFTEXT: 50256},
}
def p50k_edit():
mergeable_ranks = load_tiktoken_bpe(
"https://openaipublic.blob.core.windows.net/encodings/p50k_base.tiktoken",
expected_hash="94b5ca7dff4d00767bc256fdd1b27e5b17361d7b8a5f968547f9f23eb70d2069",
)
special_tokens = {ENDOFTEXT: 50256, FIM_PREFIX: 50281, FIM_MIDDLE: 50282, FIM_SUFFIX: 50283}
return {
"name": "p50k_edit",
"pat_str": r50k_pat_str,
"mergeable_ranks": mergeable_ranks,
"special_tokens": special_tokens,
}
def cl100k_base():
mergeable_ranks = load_tiktoken_bpe(
"https://openaipublic.blob.core.windows.net/encodings/cl100k_base.tiktoken",
expected_hash="223921b76ee99bde995b7ff738513eef100fb51d18c93597a113bcffe865b2a7",
)
special_tokens = {
ENDOFTEXT: 100257,
FIM_PREFIX: 100258,
FIM_MIDDLE: 100259,
FIM_SUFFIX: 100260,
ENDOFPROMPT: 100276,
}
return {
"name": "cl100k_base",
"pat_str": r"""'(?i:[sdmt]|ll|ve|re)|[^\r\n\p{L}\p{N}]?+\p{L}++|\p{N}{1,3}+| ?[^\s\p{L}\p{N}]++[\r\n]*+|\s++$|\s*[\r\n]|\s+(?!\S)|\s""",
"mergeable_ranks": mergeable_ranks,
"special_tokens": special_tokens,
}
def o200k_base():
mergeable_ranks = load_tiktoken_bpe(
"https://openaipublic.blob.core.windows.net/encodings/o200k_base.tiktoken",
expected_hash="446a9538cb6c348e3516120d7c08b09f57c36495e2acfffe59a5bf8b0cfb1a2d",
)
special_tokens = {ENDOFTEXT: 199999, ENDOFPROMPT: 200018}
# This regex could be made more efficient. If I was the one working on this encoding, I would
# have done a few other things differently too, e.g. I think you can allocate tokens more
# efficiently across languages.
pat_str = "|".join(
[
r"""[^\r\n\p{L}\p{N}]?[\p{Lu}\p{Lt}\p{Lm}\p{Lo}\p{M}]*[\p{Ll}\p{Lm}\p{Lo}\p{M}]+(?i:'s|'t|'re|'ve|'m|'ll|'d)?""",
r"""[^\r\n\p{L}\p{N}]?[\p{Lu}\p{Lt}\p{Lm}\p{Lo}\p{M}]+[\p{Ll}\p{Lm}\p{Lo}\p{M}]*(?i:'s|'t|'re|'ve|'m|'ll|'d)?""",
r"""\p{N}{1,3}""",
r""" ?[^\s\p{L}\p{N}]+[\r\n/]*""",
r"""\s*[\r\n]+""",
r"""\s+(?!\S)""",
r"""\s+""",
]
)
return {
"name": "o200k_base",
"pat_str": pat_str,
"mergeable_ranks": mergeable_ranks,
"special_tokens": special_tokens,
}
def o200k_harmony():
base_enc = o200k_base()
name = "o200k_harmony"
pat_str = base_enc["pat_str"]
mergeable_ranks = base_enc["mergeable_ranks"]
special_tokens = {
**base_enc["special_tokens"],
"<|startoftext|>": 199998,
"<|endoftext|>": 199999,
"<|reserved_200000|>": 200000,
"<|reserved_200001|>": 200001,
"<|return|>": 200002,
"<|constrain|>": 200003,
"<|reserved_200004|>": 200004,
"<|channel|>": 200005,
"<|start|>": 200006,
"<|end|>": 200007,
"<|message|>": 200008,
"<|reserved_200009|>": 200009,
"<|reserved_200010|>": 200010,
"<|reserved_200011|>": 200011,
"<|call|>": 200012,
} | {f"<|reserved_{i}|>": i for i in range(200013, 201088)}
return {
"name": name,
"pat_str": pat_str,
"mergeable_ranks": mergeable_ranks,
"special_tokens": special_tokens,
}
ENCODING_CONSTRUCTORS = {
"gpt2": gpt2,
"r50k_base": r50k_base,
"p50k_base": p50k_base,
"p50k_edit": p50k_edit,
"cl100k_base": cl100k_base,
"o200k_base": o200k_base,
"o200k_harmony": o200k_harmony,
}
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