Use local import of pyvips in case it isn't set up

.github/workflows/ci.yml

@@ -44,7 +44,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install vips and openslide
-        run: sudo apt-get update && sudo apt-get install -yq libvips-dev
+        run: sudo apt-get update && sudo apt-get install -yq libvips-dev libopenslide-dev
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip

panimg/image_builders/tiff.py

@@ -17,12 +17,6 @@
 from panimg.image_builders.dicom import get_dicom_headers_by_study
 from panimg.models import MAXIMUM_SEGMENTS_LENGTH, ColorSpace, TIFFImage
 
-try:
-    import pyvips
-except OSError:
-    pyvips = False
-
-
 DICOM_WSI_STORAGE_ID = "1.2.840.10008.5.1.4.1.1.77.1.6"
 
 
@@ -253,10 +247,13 @@ def _load_with_tiff(
 def _load_with_openslide(
     *, gc_file: GrandChallengeTiffFile
 ) -> GrandChallengeTiffFile:
+    import pyvips
+
     open_slide_file = pyvips.Image.openslideload(str(gc_file.path.absolute()))
     gc_file = _extract_openslide_properties(
         gc_file=gc_file, image=open_slide_file
     )
+
     return gc_file
 
 
@@ -345,6 +342,8 @@ def _convert(
 
 
 def _convert_to_tiff(*, path: Path, pk: UUID, output_directory: Path) -> Path:
+    import pyvips
+
     new_file_name = output_directory / path.name / f"{pk}.tif"
     new_file_name.parent.mkdir()
 
@@ -510,13 +509,6 @@ def image_builder_tiff(  # noqa: C901
     *, files: set[Path]
 ) -> Iterator[TIFFImage]:
 
-    if pyvips is False:
-        raise ImportError(
-            f"Could not import pyvips, which is required for the "
-            f"{__name__} image builder. Either ensure that libvips-dev "
-            f"is installed or remove {__name__} from your list of builders."
-        )
-
     file_errors: DefaultDict[Path, list[str]] = defaultdict(list)
 
     with TemporaryDirectory() as output_directory:

panimg/post_processors/tiff_to_dzi.py

@@ -3,23 +3,10 @@
 from panimg.models import ImageType, PanImgFile, PostProcessorResult
 from panimg.settings import DZI_TILE_SIZE
 
-try:
-    import pyvips
-except OSError:
-    pyvips = False
-
 logger = logging.getLogger(__name__)
 
 
 def tiff_to_dzi(*, image_files: set[PanImgFile]) -> PostProcessorResult:
-    if pyvips is False:
-        raise ImportError(
-            f"Could not import pyvips, which is required for the "
-            f"{__name__} post processor. Either ensure that libvips-dev "
-            f"is installed or remove {__name__} from your list of post "
-            f"processors."
-        )
-
     new_image_files: set[PanImgFile] = set()
 
     for file in image_files:
@@ -36,6 +23,8 @@ def tiff_to_dzi(*, image_files: set[PanImgFile]) -> PostProcessorResult:
 
 
 def _create_dzi_image(*, tiff_file: PanImgFile) -> PostProcessorResult:
+    import pyvips
+
     # Creates a dzi file and corresponding tiles in directory {pk}_files
     dzi_output = tiff_file.file.parent / str(tiff_file.image_id)