diff options
Diffstat (limited to 'convert-gptneox-hf-to-gguf.py')
| -rwxr-xr-x | convert-gptneox-hf-to-gguf.py | 173 |
1 files changed, 70 insertions, 103 deletions
diff --git a/convert-gptneox-hf-to-gguf.py b/convert-gptneox-hf-to-gguf.py index d9c42d76..38e71e03 100755 --- a/convert-gptneox-hf-to-gguf.py +++ b/convert-gptneox-hf-to-gguf.py @@ -8,6 +8,7 @@ import struct import json import numpy as np import torch +import argparse from typing import Any, List from pathlib import Path @@ -34,11 +35,10 @@ def bytes_to_unicode(): bs.append(b) cs.append(2**8+n) n += 1 - cs = [chr(n) for n in cs] - return dict(zip(bs, cs)) + return dict(zip(bs, (chr(n) for n in cs))) -def count_model_parts(dir_model: str) -> int: +def count_model_parts(dir_model: Path) -> int: num_parts = 0 for filename in os.listdir(dir_model): if filename.startswith("pytorch_model-"): @@ -49,16 +49,21 @@ def count_model_parts(dir_model: str) -> int: return num_parts -if len(sys.argv) < 3: - print(f"Usage: python {sys.argv[0]} dir-model ftype\n") - print(" ftype == 0 -> float32") - print(" ftype == 1 -> float16") - sys.exit(1) +def parse_args() -> argparse.Namespace: + parser = argparse.ArgumentParser(description="Convert a GPT-NeoX model to a GGML compatible file") + parser.add_argument("--vocab-only", action="store_true", help="extract only the vocab") + parser.add_argument("--outfile", type=Path, help="path to write to; default: based on input") + parser.add_argument("model", type=Path, help="directory containing model file, or model file itself (*.bin)") + parser.add_argument("ftype", type=int, choices=[0, 1], help="output format - use 0 for float32, 1 for float16", default = 1) + return parser.parse_args() +args = parse_args() -# output in the same directory as the model -dir_model = sys.argv[1] -last_dir = os.path.basename(os.path.normpath(dir_model)) +dir_model = args.model +ftype = args.ftype +if not dir_model.is_dir(): + print(f'Error: {args.model} is not a directory', file = sys.stderr) + sys.exit(1) # possible tensor data types # ftype == 0 -> float32 @@ -67,19 +72,15 @@ last_dir = os.path.basename(os.path.normpath(dir_model)) # map from ftype to string ftype_str = ["f32", "f16"] -ftype = 1 -if len(sys.argv) > 2: - ftype = int(sys.argv[2]) - if ftype < 0 or ftype > 1: - print("Invalid ftype: " + str(ftype)) - - sys.exit(1) - -fname_out = sys.argv[1] + "/ggml-model-" + ftype_str[ftype] + ".gguf" +if args.outfile is not None: + fname_out = args.outfile +else: + # output in the same directory as the model by default + fname_out = dir_model / f'ggml-model-{ftype_str[ftype]}.gguf' -print("gguf: loading model "+last_dir) +print("gguf: loading model "+dir_model.name) -with open(dir_model + "/config.json", "r", encoding="utf-8") as f: +with open(dir_model / "config.json", "r", encoding="utf-8") as f: hparams = json.load(f) if hparams["architectures"][0] != "GPTNeoXForCausalLM": @@ -97,7 +98,7 @@ print("gguf: get model metadata") block_count = hparams["num_hidden_layers"] -gguf_writer.add_name(last_dir) +gguf_writer.add_name(dir_model.name) gguf_writer.add_context_length(hparams["max_position_embeddings"]) gguf_writer.add_embedding_length(hparams["hidden_size"]) gguf_writer.add_block_count(block_count) @@ -111,86 +112,52 @@ gguf_writer.add_layer_norm_eps(hparams["layer_norm_eps"]) print("gguf: get tokenizer metadata") -tokens: List[str] = [] -merges: List[str] = [] - - -if Path(dir_model + "/tokenizer.json").is_file(): - # gpt2 tokenizer - gguf_writer.add_tokenizer_model("gpt2") - - print("gguf: get gpt2 tokenizer merges") +tokens: List[bytearray] = [] - with open(dir_model + "/tokenizer.json", "r", encoding="utf-8") as f: - tokenizer_json = json.load(f) - merges = tokenizer_json["model"]["merges"] - - gguf_writer.add_token_merges(merges) - - print("gguf: get gpt2 tokenizer vocab") - - vocab_size = len(tokenizer_json["model"]["vocab"]) - - # ref: https://github.com/cmp-nct/ggllm.cpp/blob/master/falcon_convert.py - tokenizer = AutoTokenizer.from_pretrained(dir_model) - - reverse_vocab = {id: encoded_tok for encoded_tok, id in tokenizer.vocab.items()} - byte_encoder = bytes_to_unicode() - byte_decoder = {v: k for k, v in byte_encoder.items()} - - for i in range(vocab_size): - if i in reverse_vocab: - try: - text = bytearray([byte_decoder[c] for c in reverse_vocab[i]]) - except KeyError: - text = bytearray() - for c in reverse_vocab[i]: - if ord(c) < 256: # single byte character - text.append(byte_decoder[ord(c)]) - else: # multibyte special token character - text.extend(c.encode('utf-8')) - else: - print(f"Key {i} not in tokenizer vocabulary. Padding with an arbitrary token.") - pad_token = f"[PAD{i}]".encode("utf8") - text = bytearray(pad_token) - - tokens.append(text) +tokenizer_json_file = dir_model / 'tokenizer.json' +if not tokenizer_json_file.is_file(): + print(f'Error: Missing {tokenizer_json_file}', file = sys.stderr) + sys.exit(1) - gguf_writer.add_token_list(tokens) +# gpt2 tokenizer +gguf_writer.add_tokenizer_model("gpt2") - if "added_tokens" in tokenizer_json and Path(dir_model + "/tokenizer_config.json").is_file(): - print("gguf: get special token ids") +with open(tokenizer_json_file, "r", encoding="utf-8") as f: + tokenizer_json = json.load(f) - with open(dir_model + "/tokenizer_config.json", "r", encoding="utf-8") as f: - tokenizer_config = json.load(f) +print("gguf: get gpt2 tokenizer vocab") - # find special token ids +vocab_size = len(tokenizer_json["model"]["vocab"]) - if "bos_token" in tokenizer_config: - for key in tokenizer_json["added_tokens"]: - if key["content"] == tokenizer_config["bos_token"]: - gguf_writer.add_bos_token_id(key["id"]) +# ref: https://github.com/cmp-nct/ggllm.cpp/blob/master/falcon_convert.py +tokenizer = AutoTokenizer.from_pretrained(dir_model) - if "eos_token" in tokenizer_config: - for key in tokenizer_json["added_tokens"]: - if key["content"] == tokenizer_config["eos_token"]: - gguf_writer.add_eos_token_id(key["id"]) +reverse_vocab = {id: encoded_tok for encoded_tok, id in tokenizer.vocab.items()} +byte_encoder = bytes_to_unicode() +byte_decoder = {v: k for k, v in byte_encoder.items()} - if "unk_token" in tokenizer_config: - for key in tokenizer_json["added_tokens"]: - if key["content"] == tokenizer_config["unk_token"]: - gguf_writer.add_unk_token_id(key["id"]) +for i in range(vocab_size): + if i in reverse_vocab: + try: + text = bytearray([byte_decoder[c] for c in reverse_vocab[i]]) + except KeyError: + text = bytearray() + for c in reverse_vocab[i]: + if ord(c) < 256: # single byte character + text.append(byte_decoder[ord(c)]) + else: # multibyte special token character + text.extend(c.encode('utf-8')) + else: + print(f"Key {i} not in tokenizer vocabulary. Padding with an arbitrary token.") + pad_token = f"[PAD{i}]".encode("utf8") + text = bytearray(pad_token) - if "sep_token" in tokenizer_config: - for key in tokenizer_json["added_tokens"]: - if key["content"] == tokenizer_config["sep_token"]: - gguf_writer.add_sep_token_id(key["id"]) + tokens.append(text) - if "pad_token" in tokenizer_config: - for key in tokenizer_json["added_tokens"]: - if key["content"] == tokenizer_config["pad_token"]: - gguf_writer.add_pad_token_id(key["id"]) +gguf_writer.add_token_list(tokens) +special_vocab = gguf.SpecialVocab(dir_model, load_merges = True) +special_vocab.add_to_gguf(gguf_writer) # TENSORS @@ -200,13 +167,15 @@ tensor_map = gguf.get_tensor_name_map(ARCH,block_count) print("gguf: get tensor metadata") if num_parts == 0: - part_names = ("pytorch_model.bin",) + part_names = iter(("pytorch_model.bin",)) else: part_names = ( f"pytorch_model-{n:05}-of-{num_parts:05}.bin" for n in range(1, num_parts + 1) ) for part_name in part_names: + if args.vocab_only: + break print("gguf: loading model part '" + part_name + "'") model_part = torch.load(f"{dir_model}/{part_name}", map_location="cpu") @@ -226,11 +195,8 @@ for part_name in part_names: data = data.squeeze().numpy() # map tensor names - if name.endswith(".weight") and name[:-7] in tensor_map: - name = tensor_map[name[:-7]] + ".weight" - elif name.endswith(".bias") and name[:-5] in tensor_map: - name = tensor_map[name[:-5]] + ".bias" - else: + new_name = tensor_map.get_name(name, try_suffixes = (".weight", ".bias")) + if new_name is None: print("Can not map tensor '" + name + "'") sys.exit() @@ -249,19 +215,20 @@ for part_name in part_names: if ftype == 1 and data_dtype == np.float32 and name.endswith(".weight") and n_dims == 2: data = data.astype(np.float16) - print(name + ", n_dims = " + str(n_dims) + ", " + str(old_dtype) + " --> " + str(data.dtype)) + print(new_name + ", n_dims = " + str(n_dims) + ", " + str(old_dtype) + " --> " + str(data.dtype)) - gguf_writer.add_tensor(name, data) + gguf_writer.add_tensor(new_name, data) print("gguf: write header") gguf_writer.write_header_to_file() print("gguf: write metadata") gguf_writer.write_kv_data_to_file() -print("gguf: write tensors") -gguf_writer.write_tensors_to_file() +if not args.vocab_only: + print("gguf: write tensors") + gguf_writer.write_tensors_to_file() gguf_writer.close() -print("gguf: model successfully exported to '" + fname_out + "'") +print(f"gguf: model successfully exported to '{fname_out}'") print("") |