chore: add comment

hanxiao · web-flow · commit 950d97e1873d · 2022-04-30T08:17:25.000+02:00
diff --git a/docarray/array/storage/qdrant/backend.py b/docarray/array/storage/qdrant/backend.py
@@ -187,7 +187,7 @@ def _map_embedding(self, embedding: 'ArrayType') -> List[float]:
         if embedding.ndim > 1:
             embedding = np.asarray(embedding).squeeze()
 
-        if embedding.ndim == 0:
+        if embedding.ndim == 0:  # scalar
             embedding = np.array([embedding])
 
         if np.all(embedding == 0):
