fix python2ism

diff --git a/dns/node.py b/dns/node.py
index 32f9c08a112224d96962cef87f9ce1904b026650..bfe8c073bd7eff0f22ff34ea168c287a6abc61d7 100644 (file)
--- a/dns/node.py
+++ b/dns/node.py
@@ -168,7 +168,7 @@ class Node(object):
         """
 
         if not isinstance(replacement, dns.rdataset.Rdataset):
-            raise ValueError, 'replacement is not an rdataset'
+            raise ValueError('replacement is not an rdataset')
         self.delete_rdataset(replacement.rdclass, replacement.rdtype,
                              replacement.covers)
         self.rdatasets.append(replacement)