wcs?_utils: wrap to_netcdf in bytes()

Xarray 2025.9.0 returns a memoryview
instead of bytes when the path argument
is None, so wrap the call in bytes()
and adjust the type signature to
correspond to that.

Author: pjonsson

datacube_ows/wcs1_utils.py

@@ -10,7 +10,6 @@
 import xarray
 import xarray as xr
 from affine import Affine
-from dask.delayed import Delayed
 from dateutil.parser import parse
 from odc.geo import geom
 from odc.geo.geobox import GeoBox
@@ -523,7 +522,7 @@ def get_tiff(req, data: xr.Dataset) -> bytes:
         return memfile.read()
 
 
-def get_netcdf(req, data: xr.Dataset) -> bytes | Delayed | None:
+def get_netcdf(req, data: xr.Dataset) -> bytes:
     # Cleanup dataset attributes for NetCDF export
     data.attrs["crs"] = req.response_crsid
     for _, v in data.data_vars.items():
@@ -536,4 +535,4 @@ def get_netcdf(req, data: xr.Dataset) -> bytes | Delayed | None:
         del data["time"].attrs["units"]
 
     # And export to NetCDF
-    return data.to_netcdf()
+    return bytes(data.to_netcdf())

datacube_ows/wcs2_utils.py

@@ -431,4 +431,4 @@ def get_netcdf(request, data: xr.Dataset, crs) -> bytes:
         del data["time"].attrs["units"]
 
     # And export to NetCDF
-    return data.to_netcdf()
+    return bytes(data.to_netcdf())