gguf-py : move scripts directory (#11116)
* Moved scripts dir and fixed pyproject.toml * updated readme * fixed README urls * bump pypi gguf to v0.14.0 * retrigger ci * empty commit - trigger ci
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8 changed files with 9 additions and 10 deletions
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#!/usr/bin/env python3
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from __future__ import annotations
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import logging
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import argparse
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import os
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import sys
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from tqdm import tqdm
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from pathlib import Path
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import numpy as np
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# Necessary to load the local gguf package
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if "NO_LOCAL_GGUF" not in os.environ and (Path(__file__).parent.parent.parent / 'gguf-py').exists():
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sys.path.insert(0, str(Path(__file__).parent.parent))
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import gguf
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logger = logging.getLogger("gguf-convert-endian")
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def convert_byteorder(reader: gguf.GGUFReader, args: argparse.Namespace) -> None:
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if np.uint32(1) == np.uint32(1).newbyteorder("<"):
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# Host is little endian
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host_endian = "little"
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swapped_endian = "big"
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else:
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# Sorry PDP or other weird systems that don't use BE or LE.
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host_endian = "big"
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swapped_endian = "little"
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if reader.byte_order == "S":
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file_endian = swapped_endian
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else:
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file_endian = host_endian
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order = host_endian if args.order == "native" else args.order
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logger.info(f"* Host is {host_endian.upper()} endian, GGUF file seems to be {file_endian.upper()} endian")
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if file_endian == order:
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logger.info(f"* File is already {order.upper()} endian. Nothing to do.")
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sys.exit(0)
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logger.info("* Checking tensors for conversion compatibility")
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for tensor in reader.tensors:
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if tensor.tensor_type not in (
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gguf.GGMLQuantizationType.F32,
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gguf.GGMLQuantizationType.F16,
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gguf.GGMLQuantizationType.Q8_0,
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):
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raise ValueError(f"Cannot handle type {tensor.tensor_type.name} for tensor {repr(tensor.name)}")
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logger.info(f"* Preparing to convert from {file_endian.upper()} to {order.upper()}")
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if args.dry_run:
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return
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logger.warning("*** Warning *** Warning *** Warning **")
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logger.warning("* This conversion process may damage the file. Ensure you have a backup.")
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if order != host_endian:
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logger.warning("* Requested endian differs from host, you will not be able to load the model on this machine.")
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logger.warning("* The file will be modified immediately, so if conversion fails or is interrupted")
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logger.warning("* the file will be corrupted. Enter exactly YES if you are positive you want to proceed:")
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response = input("YES, I am sure> ")
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if response != "YES":
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logger.warning("You didn't enter YES. Okay then, see ya!")
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sys.exit(0)
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logger.info(f"* Converting fields ({len(reader.fields)})")
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for idx, field in enumerate(reader.fields.values()):
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logger.info(f"- {idx:4}: Converting field {repr(field.name)}, part count: {len(field.parts)}")
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for part in field.parts:
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part.byteswap(inplace=True)
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logger.info(f"* Converting tensors ({len(reader.tensors)})")
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for idx, tensor in enumerate(pbar := tqdm(reader.tensors, desc="Converting tensor")):
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log_message = (
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f"Converting tensor {repr(tensor.name)}, "
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f"type={tensor.tensor_type.name}, "
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f"elements={tensor.n_elements} "
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)
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# Byte-swap each part of the tensor's field
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for part in tensor.field.parts:
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part.byteswap(inplace=True)
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# Byte-swap tensor data if necessary
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if tensor.tensor_type == gguf.GGMLQuantizationType.Q8_0:
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# Handle Q8_0 tensor blocks (block_q8_0)
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# Specific handling of block_q8_0 is required.
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# Each block_q8_0 consists of an f16 delta (scaling factor) followed by 32 int8 quantizations.
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block_size = 34 # 34 bytes = <f16 delta scaling factor> + 32 * <int8 quant>
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n_blocks = len(tensor.data) // block_size
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for block_num in (inner_pbar := tqdm(range(n_blocks), desc="Byte-swapping Blocks", leave=False)):
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block_offs = block_num * block_size
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# Byte-Swap f16 sized delta field
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delta = tensor.data[block_offs:block_offs + 2].view(dtype=np.uint16)
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delta.byteswap(inplace=True)
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# Byte-Swap Q8 weights
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if block_num % 100000 == 0:
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inner_pbar.set_description(f"Byte-swapping Blocks [{(n_blocks - block_num) // n_blocks}]")
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else:
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# Handle other tensor types
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tensor.data.byteswap(inplace=True)
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pbar.set_description(log_message)
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logger.info("* Completion")
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def main() -> None:
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parser = argparse.ArgumentParser(description="Convert GGUF file byte order")
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parser.add_argument(
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"model", type=str,
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help="GGUF format model filename",
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)
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parser.add_argument(
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"order", type=str, choices=['big', 'little', 'native'],
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help="Requested byte order",
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)
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parser.add_argument(
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"--dry-run", action="store_true",
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help="Don't actually change anything",
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)
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parser.add_argument("--verbose", action="store_true", help="increase output verbosity")
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args = parser.parse_args(None if len(sys.argv) > 1 else ["--help"])
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logging.basicConfig(level=logging.DEBUG if args.verbose else logging.INFO)
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logger.info(f'* Loading: {args.model}')
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reader = gguf.GGUFReader(args.model, 'r' if args.dry_run else 'r+')
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convert_byteorder(reader, args)
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if __name__ == "__main__":
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main()
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