File python3-py3dns-handle-absent-resolv.patch of Package python-py3dns

From c95cb269a6f0cb57c1204c29bec30d40e41eb2ef Mon Sep 17 00:00:00 2001
From: Ralph Bean <rbean@redhat.com>
Date: Thu, 2 Feb 2017 12:19:00 -0500
Subject: [PATCH] Handle /etc/resolv.conf

---
 DNS/Base.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

Index: py3dns-3.2.1/DNS/Base.py
===================================================================
--- py3dns-3.2.1.orig/DNS/Base.py
+++ py3dns-3.2.1/DNS/Base.py
@@ -11,7 +11,7 @@ Changes for Python3 port © 2011-14 Scot
     Base functionality. Request and Response classes, that sort of thing.
 """
 
-import socket, string, types, time, select
+import socket, string, types, time, select, warnings
 import errno
 from . import Type,Class,Opcode
 import asyncore
@@ -50,8 +50,12 @@ defaults= { 'protocol':'udp', 'port':53,
 
 def ParseResolvConf(resolv_path="/etc/resolv.conf"):
     "parses the /etc/resolv.conf file and sets defaults for name servers"
-    with open(resolv_path, 'r') as stream:
-        return ParseResolvConfFromIterable(stream)
+    try:
+        with open(resolv_path, 'r') as stream:
+            return ParseResolvConfFromIterable(stream)
+    except FileNotFoundError as e:
+        warnings.warn(e)
+        return
 
 def ParseResolvConfFromIterable(lines):
     "parses a resolv.conf formatted stream and sets defaults for name servers"