From c03b6e09fd8bde01bf5928b439358b69a1ec7962 Mon Sep 17 00:00:00 2001
From: Federico Caselli <cfederico87@gmail.com>
Date: Sat, 24 Jul 2021 19:17:49 +0200
Subject: Support generics in code to allow Column[int] etc

Fixes: #6804
Fixes: #6759
Change-Id: Ie7f32c38a22dbfa059b5709b883ff464b16031ae
---
 lib/sqlalchemy/sql/visitors.py | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'lib/sqlalchemy/sql')

diff --git a/lib/sqlalchemy/sql/visitors.py b/lib/sqlalchemy/sql/visitors.py
index 1cd7b63cd..7111c5efd 100644
--- a/lib/sqlalchemy/sql/visitors.py
+++ b/lib/sqlalchemy/sql/visitors.py
@@ -120,6 +120,10 @@ class Traversible(util.with_metaclass(TraversibleType)):
 
     """
 
+    def __class_getitem__(cls, key):
+        # allow generic classes in py3.9+
+        return cls
+
     @util.preload_module("sqlalchemy.sql.traversals")
     def get_children(self, omit_attrs=(), **kw):
         r"""Return immediate child :class:`.visitors.Traversible`
-- 
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