From b78bc734d9f75e3d6179583e72a450cd899e12d3 Mon Sep 17 00:00:00 2001
From: Rong Ou <rong.ou@gmail.com>
Date: Fri, 2 Sep 2022 01:30:01 -0700
Subject: [PATCH] Fix dask.py lint error (#8216)

---
 python-package/xgboost/dask.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python-package/xgboost/dask.py b/python-package/xgboost/dask.py
index 951676a81..75eeba875 100644
--- a/python-package/xgboost/dask.py
+++ b/python-package/xgboost/dask.py
@@ -1684,7 +1684,7 @@ class DaskScikitLearnBase(XGBModel):
 
     def __getstate__(self) -> Dict:
         this = self.__dict__.copy()
-        if "_client" in this.keys():
+        if "_client" in this:
             del this["_client"]
         return this