fix: handle hf's with 'flowpath-attributes'

python/ngen_cal/src/ngen/cal/ngen.py

@@ -136,7 +136,19 @@ def _read_hydrofabric(self):
         self._flowpath_hydro_fabric = gpd.read_file(self.hydrofabric, layer='flowpaths')
         self._flowpath_hydro_fabric.set_index('id', inplace=True)
 
-        attributes = gpd.read_file(self.hydrofabric, layer="flowpath_attributes")
+        # DataLayerError if using pyogrio engine; ValueError if using fiona engine.
+        try:
+            # cannot assume pyogrio is installed
+            from pyogrio.errors import DataLayerError
+        except ImportError:
+            DataLayerError = ValueError
+        # some hydrofabric versions use 'flowpath_attributes' others use 'flowpath-attributes'
+        # try first then second on failure
+        try:
+            attributes = gpd.read_file(self.hydrofabric, layer="flowpath_attributes")
+        except (DataLayerError, ValueError):
+            attributes = gpd.read_file(self.hydrofabric, layer="flowpath-attributes")
+        attributes.set_index("id", inplace=True)
 
         self._x_walk = pd.Series( attributes[ ~ attributes['rl_gages'].isna() ]['rl_gages'] )