From d4a6e8d827afe5b110747702e7808b296439f2c6 Mon Sep 17 00:00:00 2001
From: Zhuoran Han <zhuoranh@mit.edu>
Date: Thu, 23 Aug 2018 15:33:19 -0500
Subject: [PATCH] Update

---
 openmc/polynomial.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/openmc/polynomial.py b/openmc/polynomial.py
index 3552819f6b..8bcb74f68a 100644
--- a/openmc/polynomial.py
+++ b/openmc/polynomial.py
@@ -1,7 +1,7 @@
 import numpy as np
 import openmc
 import openmc.capi as capi
-from collections import Iterable
+from collections.abc import Iterable
 
 
 def legendre_from_expcoef(coef, domain=(-1, 1)):