From fa1bd0f722aad839807a72ded2e1fd2bdcc7e611 Mon Sep 17 00:00:00 2001
From: "Stuart D. Gathman" <stuart@spidey2>
Date: Wed, 26 Oct 2011 17:37:09 -0400
Subject: [PATCH] Fix #847669: sign messages without DNS library.

---
 dkim/__init__.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dkim/__init__.py b/dkim/__init__.py
index 9714b7f..adf0325 100644
--- a/dkim/__init__.py
+++ b/dkim/__init__.py
@@ -38,7 +38,11 @@ from dkim.crypto import (
     RSASSA_PKCS1_v1_5_verify,
     UnparsableKeyError,
     )
-from dkim.dnsplug import get_txt
+try:
+  from dkim.dnsplug import get_txt
+except:
+  def get_txt(s):
+    raise RuntimeError("DKIM.verify requires DNS or dnspython module")
 from dkim.util import (
     get_default_logger,
     InvalidTagValueList,