Small nits and formatting (#3907)

Summary:
Pull Request resolved: #3907

same as title.
Fix checking right desc

Reviewed By: satymish

Differential Revision: D63854967

fbshipit-source-id: b8bc48662bc38ac96cf9241bdbe2be2b23f1a37e

Author: kuarora

benchs/bench_fw/benchmark.py

@@ -874,13 +874,14 @@ def create_gt_knn(self, knn_desc, search=True) -> Optional[KnnDescriptor]:
         if self.search_op:
             gt_knn_desc = self.search_op.get_flat_desc(knn_desc.flat_name())
             if gt_knn_desc is None:
-                if knn_desc.index_desc is not None:
+                if knn_desc.gt_index_desc is not None:
                     gt_index_desc = knn_desc.gt_index_desc
                 else:
                     gt_index_desc = self.build_op.get_flat_desc(
                         knn_desc.index_desc.flat_name()
                     )
                     knn_desc.gt_index_desc = gt_index_desc
+
                 assert gt_index_desc is not None
                 gt_knn_desc = KnnDescriptor(
                     d=knn_desc.d,

benchs/bench_fw/index.py

@@ -735,9 +735,6 @@ def add_range_or_val(name, range):
                     if self.search_params and name in self.search_params
                     else range
                 ),
-                [self.search_params[name]]
-                if self.search_params and name in self.search_params
-                else range,
             )
 
         add_range_or_val("snap", [0])
@@ -1023,9 +1020,11 @@ def get_quantizer(self, dry_run, pretransform=None):
             d=model_ivf.quantizer.d,
             metric=model_ivf.quantizer.metric_type,
             database_vectors=centroids,
-            construction_params=self.construction_params[1:]
-            if self.construction_params is not None
-            else None,
+            construction_params=(
+                self.construction_params[1:]
+                if self.construction_params is not None
+                else None
+            ),
             search_params=None,
             factory=reverse_index_factory(model_ivf.quantizer),
             training_vectors=centroids,