dev(narugo): add truncated check function

/extra

/resource/yolort/*

!/resource/yolort/Makefile

!/test/testfile/**/*

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[![Contributors](https://img.shields.io/github/contributors/deepghs/imgutils)](https://github.com/deepghs/imgutils/graphs/contributors)

[![GitHub license](https://img.shields.io/github/license/deepghs/imgutils)](https://github.com/deepghs/imgutils/blob/master/LICENSE)

Utilties for Images

Utilities for Images

## How to check truncated image

```python

from imgutils.validate import is_truncated_file

if __name__ == '__main__':

    filename = 'test_jpg.jpg'

    if is_truncated_file(filename):

        print('This image is truncated, you\'d better '

              'remove this shit from your dataset.')

    else:

        print('This image is okay!')

```

 No newline at end of file

from .truncate import is_truncated_file

from contextlib import contextmanager

from threading import Lock

from PIL import Image, ImageFile

_LOCK = Lock()

@contextmanager

def _mock_load_truncated_images(value: bool):

    with Lock():

        _load = ImageFile.LOAD_TRUNCATED_IMAGES

        ImageFile.LOAD_TRUNCATED_IMAGES = value

        try:

            yield

        finally:

            ImageFile.LOAD_TRUNCATED_IMAGES = _load

@_mock_load_truncated_images(False)

def is_truncated_file(path: str) -> bool:

    try:

        Image.open(path).load()

    except OSError:

        return True

    else:

        return False