gguf-py: Refactor and allow reading/modifying existing GGUF files

convert-baichuan-hf-to-gguf.py

@@ -16,7 +16,7 @@
 from sentencepiece import SentencePieceProcessor  # type: ignore[import]
 
 if 'NO_LOCAL_GGUF' not in os.environ:
-    sys.path.insert(1, str(Path(__file__).parent / 'gguf-py' / 'gguf'))
+    sys.path.insert(1, str(Path(__file__).parent / 'gguf-py'))
 import gguf
 
 

convert-llama-ggml-to-gguf.py

@@ -12,29 +12,9 @@
 
 import os
 if 'NO_LOCAL_GGUF' not in os.environ:
-    sys.path.insert(1, str(Path(__file__).parent / 'gguf-py' / 'gguf'))
+    sys.path.insert(1, str(Path(__file__).parent / 'gguf-py'))
 import gguf
 
-# Note: Does not support GGML_QKK_64
-QK_K = 256
-# Items here are (block size, type size)
-GGML_QUANT_SIZES = {
-    gguf.GGMLQuantizationType.F32  : (1, 4),
-    gguf.GGMLQuantizationType.F16  : (1, 2),
-    gguf.GGMLQuantizationType.Q4_0 : (32, 2 + 16),
-    gguf.GGMLQuantizationType.Q4_1 : (32, 2 + 2 + 16),
-    gguf.GGMLQuantizationType.Q5_0 : (32, 2 + 4 + 16),
-    gguf.GGMLQuantizationType.Q5_1 : (32, 2 + 2 + 4 + 16),
-    gguf.GGMLQuantizationType.Q8_0 : (32, 2 + 32),
-    gguf.GGMLQuantizationType.Q8_1 : (32, 4 + 4 + 32),
-    gguf.GGMLQuantizationType.Q2_K : (256, 2 + 2 + QK_K // 16 + QK_K // 4),
-    gguf.GGMLQuantizationType.Q3_K : (256, 2 + QK_K // 4 + QK_K // 8 + 12),
-    gguf.GGMLQuantizationType.Q4_K : (256, 2 + 2 + QK_K // 2 + 12),
-    gguf.GGMLQuantizationType.Q5_K : (256, 2 + 2 + QK_K // 2 + QK_K // 8 + 12),
-    gguf.GGMLQuantizationType.Q6_K : (256, 2 + QK_K // 2 + QK_K // 4 + QK_K // 16),
-    gguf.GGMLQuantizationType.Q8_K : (256, 4 + QK_K + QK_K // 8),
-}
-
 class GGMLFormat(IntEnum):
     GGML = 0
     GGMF = 1
@@ -125,7 +105,7 @@ def load(self, data, offset):
         (n_dims, name_len, dtype) = struct.unpack('<3I', data[offset:offset + 12])
         assert n_dims >= 0 and n_dims <= 4, f'Invalid tensor dimensions {n_dims}'
         assert name_len < 4096, 'Absurd tensor name length'
-        quant = GGML_QUANT_SIZES.get(dtype)
+        quant = gguf.GGML_QUANT_SIZES.get(dtype)
         assert quant is not None, 'Unknown tensor type'
         (blksize, tysize) = quant
         offset += 12

convert-persimmon-to-gguf.py

@@ -6,7 +6,7 @@
 from pathlib import Path
 from sentencepiece import SentencePieceProcessor
 if 'NO_LOCAL_GGUF' not in os.environ:
-    sys.path.insert(1, str(Path(__file__).parent / 'gguf-py' / 'gguf'))
+    sys.path.insert(1, str(Path(__file__).parent / 'gguf-py'))
 import gguf
 
 def _flatten_dict(dct, tensors, prefix=None):

convert.py

@@ -3,11 +3,9 @@
 
 import argparse
 import concurrent.futures
-import copy
 import enum
 import faulthandler
 import functools
-import io
 import itertools
 import json
 import math
@@ -23,14 +21,14 @@
 from concurrent.futures import ProcessPoolExecutor, ThreadPoolExecutor
 from dataclasses import dataclass
 from pathlib import Path
-from typing import IO, TYPE_CHECKING, Any, Callable, Generator, Iterable, Literal, Sequence, TypeVar
+from typing import IO, TYPE_CHECKING, Any, Callable, Iterable, Literal, TypeVar
 
 import numpy as np
 from sentencepiece import SentencePieceProcessor
 
 import os
 if 'NO_LOCAL_GGUF' not in os.environ:
-    sys.path.insert(1, str(Path(__file__).parent / 'gguf-py' / 'gguf'))
+    sys.path.insert(1, str(Path(__file__).parent / 'gguf-py'))
 import gguf
 
 if TYPE_CHECKING:
@@ -851,7 +849,7 @@ def add_meta_vocab(self, vocab: Vocab) -> None:
         elif isinstance(vocab, BpeVocab):
             self.gguf.add_tokenizer_model("gpt2")
         else:
-            raise ValueError(f'Unknown vocab type: Not BpeVocab or SentencePieceVocab')
+            raise ValueError('Unknown vocab type: Not BpeVocab or SentencePieceVocab')
         self.gguf.add_token_list(tokens)
         self.gguf.add_token_scores(scores)
         self.gguf.add_token_types(toktypes)
@@ -905,7 +903,7 @@ def maybe_do_quantize(item: tuple[DataType, NDArray]) -> NDArray:
         return dt.quantize(arr)
 
     @staticmethod
-    def write_all(fname_out: Path, ftype: GGMLFileType, params: Params, model: LazyModel, vocab: Vocab, svocab: gguf.SpecialVocab, concurrency: int = DEFAULT_CONCURRENCY, endianess=gguf.GGUFEndian.LITTLE) -> None:
+    def write_all(fname_out: Path, ftype: GGMLFileType, params: Params, model: LazyModel, vocab: Vocab, svocab: gguf.SpecialVocab, concurrency: int = DEFAULT_CONCURRENCY, endianess: gguf.GGUFEndian = gguf.GGUFEndian.LITTLE) -> None:
         check_vocab_size(params, vocab)
 
         of = OutputFile(fname_out, endianess=endianess)

examples/train-text-from-scratch/convert-train-checkpoint-to-gguf.py

@@ -9,7 +9,7 @@
 from pathlib import Path
 
 if 'NO_LOCAL_GGUF' not in os.environ:
-    sys.path.insert(1, str(Path(__file__).parent / '..' / '..' / 'gguf-py' / 'gguf'))
+    sys.path.insert(1, str(Path(__file__).parent / '..' / '..' / 'gguf-py'))
 import gguf
 
 # gguf constants

gguf-py/README.md

@@ -11,6 +11,16 @@ as an example for its usage.
 pip install gguf
 ```
 
+## API Examples/Simple Tools
+
+[examples/writer.py](https://github.com/ggerganov/llama.cpp/blob/master/gguf-py/examples/writer.py) — Generates `example.gguf` in the current directory to demonstrate generating a GGUF file. Note that this file cannot be used as a model.
+
+[scripts/gguf-dump.py](https://github.com/ggerganov/llama.cpp/blob/master/gguf-py/scripts/gguf-dump.py) — Dumps a GGUF file's metadata to the console.
+
+[scripts/gguf-set-metadata.py](https://github.com/ggerganov/llama.cpp/blob/master/gguf-py/scripts/gguf-set-metadata.py) — Allows changing simple metadata values in a GGUF file by key.
+
+[scripts/gguf-convert-endian.py](https://github.com/ggerganov/llama.cpp/blob/master/gguf-py/scripts/gguf-convert-endian.py) — Allows converting the endianness of GGUF files.
+
 ## Development
 Maintainers who participate in development of this package are advised to install it in editable mode:
 

gguf-py/examples/writer.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import sys
+from pathlib import Path
+
+import numpy as np
+
+# Necessary to load the local gguf package
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+from gguf import GGUFWriter  # noqa: E402
+
+
+# Example usage:
+def writer_example() -> None:
+    # Example usage with a file
+    gguf_writer = GGUFWriter("example.gguf", "llama")
+
+    gguf_writer.add_architecture()
+    gguf_writer.add_block_count(12)
+    gguf_writer.add_uint32("answer", 42)  # Write a 32-bit integer
+    gguf_writer.add_float32("answer_in_float", 42.0)  # Write a 32-bit float
+    gguf_writer.add_custom_alignment(64)
+
+    tensor1 = np.ones((32,), dtype=np.float32) * 100.0
+    tensor2 = np.ones((64,), dtype=np.float32) * 101.0
+    tensor3 = np.ones((96,), dtype=np.float32) * 102.0
+
+    gguf_writer.add_tensor("tensor1", tensor1)
+    gguf_writer.add_tensor("tensor2", tensor2)
+    gguf_writer.add_tensor("tensor3", tensor3)
+
+    gguf_writer.write_header_to_file()
+    gguf_writer.write_kv_data_to_file()
+    gguf_writer.write_tensors_to_file()
+
+    gguf_writer.close()
+
+
+if __name__ == '__main__':
+    writer_example()

gguf-py/gguf/__init__.py

@@ -1 +1,5 @@
-from .gguf import *
+from .constants import *
+from .gguf_reader import *
+from .gguf_writer import *
+from .tensor_mapping import *
+from .vocab import *