From 8b2734d6d4941842bcd1ecad34d5a6a9d7d5896f Mon Sep 17 00:00:00 2001
From: Marco Gorelli <33491632+MarcoGorelli@users.noreply.github.com>
Date: Tue, 19 Mar 2024 21:34:06 +0000
Subject: [PATCH] modin can use fastpath too

---
 narwhals/pandas_like/group_by.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/narwhals/pandas_like/group_by.py b/narwhals/pandas_like/group_by.py
index fcc67a245..9253683e2 100644
--- a/narwhals/pandas_like/group_by.py
+++ b/narwhals/pandas_like/group_by.py
@@ -58,7 +58,9 @@ def agg(
                 raise ValueError(msg)
             output_names.extend(expr._output_names)
 
-        if implementation == "pandas" and not os.environ.get("NARWHALS_FORCE_GENERIC"):
+        if implementation in ("pandas", "modin") and not os.environ.get(
+            "NARWHALS_FORCE_GENERIC"
+        ):
             return agg_pandas(
                 grouped,
                 exprs,