From a4c377cde9b010f6bee5e5e0a15e8545228d31e2 Mon Sep 17 00:00:00 2001
From: Giampaolo Rodola' <g.rodola@gmail.com>
Date: Tue, 9 Apr 2013 17:21:25 +0200
Subject: [PATCH] Do not raise exception on close() on account of socket
 attribute still being None:

>>> import asyncore
>>> d = asyncore.dispatcher()
>>> d.close()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.4/asyncore.py", line 401, in close
    self.socket.close()
AttributeError: 'NoneType' object has no attribute 'close'
>>>
---
 Lib/asyncore.py | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/Lib/asyncore.py b/Lib/asyncore.py
index f1466436d1b..75481ddde05 100644
--- a/Lib/asyncore.py
+++ b/Lib/asyncore.py
@@ -397,11 +397,12 @@ class dispatcher:
         self.accepting = False
         self.connecting = False
         self.del_channel()
-        try:
-            self.socket.close()
-        except OSError as why:
-            if why.args[0] not in (ENOTCONN, EBADF):
-                raise
+        if self.socket is not None:
+            try:
+                self.socket.close()
+            except OSError as why:
+                if why.args[0] not in (ENOTCONN, EBADF):
+                    raise
 
     # cheap inheritance, used to pass all other attribute
     # references to the underlying socket object.