check that page0 is TiffPage inst (#188)

* check that page0 is TiffPage inst * require wsinfer-zoo 0.6.2 or higher This fixes an issue where the directory $HOME/.wsinfer-zoo didn't exist and that would throw an error.
SBU-BMI · Sep 15, 2023 · 123d7c1 · 123d7c1
1 parent b05b7ee
commit 123d7c1
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diff --git a/pyproject.toml b/pyproject.toml
@@ -55,7 +55,7 @@ dependencies = [
     "torch>=1.7",
     "torchvision",
     "tqdm",
-    "wsinfer-zoo",
+    "wsinfer-zoo>=0.6.2",
 ]
 dynamic = ["version"]
 

diff --git a/wsinfer/wsi.py b/wsinfer/wsi.py
@@ -223,6 +223,8 @@ def _get_mpp_tifffile(slide_path: str | Path) -> tuple[float, float]:
     with tifffile.TiffFile(slide_path) as tif:
         series0 = tif.series[0]
         page0 = series0[0]
+        if not isinstance(page0, tifffile.TiffPage):
+            raise CannotReadSpacing("not a tifffile.TiffPage instance")
         try:
             resolution_unit = page0.tags["ResolutionUnit"].value
             x_resolution = Fraction(*page0.tags["XResolution"].value)