From ecc38ec453e677ebba6b2e8586e5667f42981068 Mon Sep 17 00:00:00 2001
From: pi <73870161+binh120702@users.noreply.github.com>
Date: Mon, 25 Nov 2024 05:50:14 +0700
Subject: [PATCH] Update ox.py (#646)

- Fix typo in None check
---
 pymoo/operators/crossover/ox.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pymoo/operators/crossover/ox.py b/pymoo/operators/crossover/ox.py
index c1716683f..f326467a5 100644
--- a/pymoo/operators/crossover/ox.py
+++ b/pymoo/operators/crossover/ox.py
@@ -36,7 +36,7 @@ def ox(receiver, donor, seq=None, shift=False):
     assert len(donor) == len(receiver)
 
     # the sequence which shall be use for the crossover
-    seq = seq if not None else random_sequence(len(receiver))
+    seq = seq if seq is not None else random_sequence(len(receiver))
     start, end = seq
 
     # the donation and a set of it to allow a quick lookup