From 71f456c7257e07ad51d530f8c177792c64454781 Mon Sep 17 00:00:00 2001
From: dencheva <dencheva@stsci.edu>
Date: Tue, 26 May 2015 14:20:54 +0000
Subject: Raise an IOError if NPOLFILE or D2IMFILE keywords have values but the
 files are not found on disk. Part of #1074

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@40433 fe389314-cf27-0410-b35b-8c050e845b92
---
 lib/stwcs/updatewcs/npol.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/stwcs/updatewcs/npol.py')

diff --git a/lib/stwcs/updatewcs/npol.py b/lib/stwcs/updatewcs/npol.py
index 2f8d836..33579f0 100644
--- a/lib/stwcs/updatewcs/npol.py
+++ b/lib/stwcs/updatewcs/npol.py
@@ -82,7 +82,7 @@ class NPOLCorr(object):
                 dx,dy = cls.getData(nplfile, ccdchip)
                 idccoeffs = cls.getIDCCoeffs(header)
 
-                if idccoeffs != None:
+                if idccoeffs is not None:
                     dx, dy = cls.transformData(dx,dy, idccoeffs)
 
                 # Determine EXTVER for the WCSDVARR extension from the
-- 
cgit