DOC Add note on the max number of extmath.cartesian arguments (#16406)

Co-authored-by: Henry <hlc5v@virginia.edu> Co-authored-by: Roman Yurchak <rth.yurchak@gmail.com>
scikit-learn · Aug 7, 2020 · eff1bdf · eff1bdf
1 parent 61ce18f
commit eff1bdf
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/sklearn/utils/extmath.py b/sklearn/utils/extmath.py
@@ -480,6 +480,10 @@ def cartesian(arrays, out=None):
            [3, 5, 6],
            [3, 5, 7]])
 
+    Notes
+    -----
+    This function may not be used on more than 32 arrays
+    because the underlying numpy functions do not support it.
     """
     arrays = [np.asarray(x) for x in arrays]
     shape = (len(x) for x in arrays)