From 28789d324d22b31cec32b66f9957521f1a3d5dfc Mon Sep 17 00:00:00 2001
From: alibaba613 <55627335+alibaba613@users.noreply.github.com>
Date: Sun, 24 Nov 2024 19:34:41 -0500
Subject: [PATCH] Update non_dominated_sorting.py (#653)

* Update non_dominated_sorting.py

Fixing error #611

* Update non_dominated_sorting.py
---
 pymoo/util/nds/non_dominated_sorting.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pymoo/util/nds/non_dominated_sorting.py b/pymoo/util/nds/non_dominated_sorting.py
index 4c053c462..ac4cfd66e 100644
--- a/pymoo/util/nds/non_dominated_sorting.py
+++ b/pymoo/util/nds/non_dominated_sorting.py
@@ -1,5 +1,5 @@
 import numpy as np
-
+import sys
 from pymoo.util.dominator import Dominator
 from pymoo.util.function_loader import load_function
 
@@ -53,7 +53,7 @@ def do(self, F, return_rank=False, only_non_dominated_front=False, n_stop_if_ran
 
 def rank_from_fronts(fronts, n):
     # create the rank array and set values
-    rank = np.full(n, 1e16, dtype=int)
+    rank = np.full(n, sys.maxsize, dtype=int)
     for i, front in enumerate(fronts):
         rank[front] = i