def _load_svs(filename: str) -> Tuple[openslide.OpenSlide, str]:
"""Load an image file located in the data directory.
Parameters
----------
filename : str
Name of the file in the histolab repository
Returns
-------
slide : openslide.OpenSlide
An OpenSlide object representing a whole-slide image.
path : str
Path where the slide is saved
Raises
------
OpenSlideError:
OpenSlide cannot open the given input
"""
try:
svs = openslide.open_slide(_fetch(filename))
except PIL.UnidentifiedImageError:
raise PIL.UnidentifiedImageError(
"Your wsi has something broken inside, a doctor is needed")
return svs, _fetch(filename)
def _wsi(self) -> Union[openslide.OpenSlide, openslide.ImageSlide]:
"""Open the slide and returns an openslide object
Returns
-------
slide : OpenSlide object
An OpenSlide object representing a whole-slide image.
"""
try:
slide = openslide.open_slide(self._path)
except PIL.UnidentifiedImageError:
raise PIL.UnidentifiedImageError(
"Your wsi has something broken inside, a doctor is needed")
except FileNotFoundError:
raise FileNotFoundError("The wsi path resource doesn't exist")
return slide
