From c83eb4d16824681293854b42e047601648be0029 Mon Sep 17 00:00:00 2001
From: tsimafeip <tsimafei.prakapenka@gmail.com>
Date: Tue, 24 Aug 2021 15:29:51 -0400
Subject: Avoid mutable object as default values

Fixes: #6915
Closes: #6916
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/6916
Pull-request-sha: 6ec484d3d14b7dd7053d10a5d550bd74eb524c8b

Change-Id: I2c87fbed44870110e35a69ee9a9e678671eeb8f0
---
 lib/sqlalchemy/sql/ddl.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/sqlalchemy/sql')

diff --git a/lib/sqlalchemy/sql/ddl.py b/lib/sqlalchemy/sql/ddl.py
index 233e79f7c..f8985548e 100644
--- a/lib/sqlalchemy/sql/ddl.py
+++ b/lib/sqlalchemy/sql/ddl.py
@@ -1081,7 +1081,7 @@ class SchemaDropper(DDLBase):
         table,
         drop_ok=False,
         _is_metadata_operation=False,
-        _ignore_sequences=[],
+        _ignore_sequences=(),
     ):
         if not drop_ok and not self._can_drop_table(table):
             return
-- 
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