Fix bilinear cache type decoding

pyresample/bilinear/xarr.py

@@ -28,10 +28,9 @@
 
 import dask.array as da
 import numpy as np
-import zarr
 from dask import delayed
 from pyproj import Proj
-from xarray import DataArray, Dataset
+from xarray import DataArray, Dataset, open_zarr
 
 from pyresample import CHUNK_SIZE
 from pyresample.bilinear._base import (
@@ -210,11 +209,11 @@ def save_resampling_info(self, filename):
     def load_resampling_info(self, filename):
         """Load bilinear resampling look-up tables and initialize the resampler."""
         try:
-            fid = zarr.open(filename, mode='r')
+            fid = open_zarr(filename, chunks="auto")
             for val in BIL_COORDINATES:
-                cache = da.array(fid[val])
+                cache = fid[val].data
                 setattr(self, val, cache)
-        except ValueError as err:
+        except (FileNotFoundError, KeyError, OSError, ValueError) as err:
             raise IOError("Invalid information loaded from resampling cache") from err
 
 

pyresample/test/test_bilinear.py

@@ -1206,6 +1206,7 @@ def test_save_and_load_bil_info(self):
             new_resampler = XArrayBilinearResampler(self.source_def, self.target_def,
                                                     self.radius)
             new_resampler.load_resampling_info(filename)
+            self.assertEqual(new_resampler.mask_slices.dtype, bool)
 
             for attr in CACHE_INDICES:
                 orig = getattr(resampler, attr)