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Added safetensors files. #18

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<!--
SPDX-FileCopyrightText: 2022 KOLANICH
SPDX-License-Identifier: Unlicense
-->

# HuggingFace🤗 `safetensors` format

These are the samples of [`safetensors` format](https://github.com/huggingface/safetensors) used for serialization of models for HuggingFace Hub.
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#!/usr/bin/env python3

from pathlib import Path

import numpy as np
import safetensors.numpy

import safetensors


__author__ = "KOLANICH"
__copyright__ = "Public domain"
__license__ = "Unlicense"

__reuse__ = """SPDX-FileCopyrightText: Uncopyrightable
SPDX-License-Identifier: Unlicense
"""

thisDir = Path(".").absolute()


ambigiousTypes = set("LPQlpq") # these letters result into the same arrays


def makeTypeCodes():
typeCodes = "".join(
sorted(set("".join(np.typecodes[el] for el in ("Complex", "AllInteger", "AllFloat"))))
)
typeCodes = "".join(set(typeCodes) - ambigiousTypes)
return typeCodes


def makeNumpyDict(typeCodes) -> dict:
npDict = {}
shapes = (
(8,),
(2, 4),
(4, 2),
(2, 2, 2),
)
for t in typeCodes:
a = np.array(range(-3, 5), dtype="<" + t)
try:
testDic = {t + "x".join(str(el) for el in shape): a.reshape(shape) for shape in shapes}
safetensors.numpy.save(testDic) # testing if the type safetensors-serializeable
except BaseException as ex: # pylint:disable=broad-except
print(t, a.dtype, ex)
else:
npDict.update(testDic)
return npDict


EXT = ".safetensors"


def dumpFile(name: str, data: bytes):
fn = name + EXT
(thisDir / fn).write_bytes(data)
(thisDir / (fn + ".license")).write_text(__reuse__)


def main():
typeCodes = makeTypeCodes()
npDict = makeNumpyDict(typeCodes)
metaDict = {"test": "a"}
dumpFile("overall", safetensors.numpy.save(npDict, metaDict))

for k, v in npDict.items():
dumpFile(k, safetensors.numpy.save({k: v}, metaDict))


if __name__ == "__main__":
main()
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