diff --git a/nebula3/gclient/net/ConnectionPool.py b/nebula3/gclient/net/ConnectionPool.py
index db5dc06f..e53750d1 100644
--- a/nebula3/gclient/net/ConnectionPool.py
+++ b/nebula3/gclient/net/ConnectionPool.py
@@ -307,9 +307,7 @@ def _remove_idle_unusable_connection(self):
                             )
                             conns.remove(connection)
                             continue
-                        if (
-                            self._configs.idle_time != 0
-                        ):
+                        if self._configs.idle_time != 0:
                             logger.debug(
                                 "Remove the idle connection to {}".format(
                                     connection.get_address()