From 93d0766e1f679d39dfb712315c6fd210869e68cf Mon Sep 17 00:00:00 2001
From: Guillaume Lemaitre <g.lemaitre58@gmail.com>
Date: Thu, 20 Jul 2017 14:10:46 +0200
Subject: [PATCH] [MRG] DOC add non support of COO safe indexing (#9423)

---
 sklearn/utils/__init__.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sklearn/utils/__init__.py b/sklearn/utils/__init__.py
index fc71c387903a3..332e856c641db 100644
--- a/sklearn/utils/__init__.py
+++ b/sklearn/utils/__init__.py
@@ -135,6 +135,11 @@ def safe_indexing(X, indices):
     -------
     subset
         Subset of X on first axis
+
+    Notes
+    -----
+    CSR, CSC, and LIL sparse matrices are supported. COO sparse matrices are
+    not supported.
     """
     if hasattr(X, "iloc"):
         # Pandas Dataframes and Series