no need to check, validation done in cosine_similarity

Charlie-XIAO · Charlie-XIAO · commit 10c261ff10ca · 2023-04-02T01:49:55.000+08:00
diff --git a/sklearn/metrics/pairwise.py b/sklearn/metrics/pairwise.py
@@ -977,12 +977,6 @@ def manhattan_distances(X, Y=None, *, sum_over_features="deprecated"):
     return D.reshape((-1, X.shape[1]))
 
 
-@validate_params(
-    {
-        "X": ["array-like", "sparse matrix"],
-        "Y": ["array-like", "sparse matrix", None],
-    }
-)
 def cosine_distances(X, Y=None):
     """Compute cosine distance between samples in X and Y.
 
