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Browse files- fp16ify.py +55 -0
- model.safetensors +2 -2
fp16ify.py
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#!/usr/bin/env python3
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"""
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Convert all tensors that are not float16 in a .safetensors file
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into float16 and save the result. Requires torch and safetensors.
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"""
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import argparse
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from pathlib import Path
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import torch
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from safetensors.torch import load_file, save_file
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def convert_to_f16(inp: Path, out: Path | None = None, dry_run: bool = False) -> None:
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"""
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Load `inp`, cast every non‑float16 tensor to float16, then save to `out`.
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If `out` is None, appends `.f16.safetensors` to the original name.
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"""
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inp = Path(inp)
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out = Path(out) if out is not None else inp.with_suffix(".f16.safetensors")
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weights = load_file(str(inp))
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new_weights: dict[str, torch.Tensor] = {}
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changed = False
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for name, tensor in weights.items():
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if tensor.dtype is torch.float16:
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new_weights[name] = tensor
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else:
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changed = True
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new_weights[name] = tensor.half()
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print(f"{name}: {tensor.dtype} -> float16")
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if dry_run:
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print("Dry run: no file written.")
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return
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save_file(new_weights, str(out))
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print(f"Saved converted model to {out} ({'modified' if changed else 'no change needed'}).")
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def main() -> None:
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parser = argparse.ArgumentParser(
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description="Cast every non‑float16 tensor in a .safetensors file to float16."
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)
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parser.add_argument("input", help="Path to the input .safetensors file")
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parser.add_argument("-o", "--output", help="Path for the output file")
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parser.add_argument("--dry-run", action="store_true", help="Scan only; don’t write output")
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args = parser.parse_args()
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convert_to_f16(args.input, args.output, args.dry_run)
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if __name__ == "__main__":
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main()
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model.safetensors
CHANGED
@@ -1,3 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:
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size
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version https://git-lfs.github.com/spec/v1
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oid sha256:a7653cd597f246b9240ff1253de6c1d4e9cd7e67181ba35211562d626aa277b9
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size 12102726856
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