From c071595cf34178747118e763e4d5464672d32193 Mon Sep 17 00:00:00 2001
From: coolyuyuyu <coolyuyuyu@gmail.com>
Date: Sat, 10 Jan 2015 18:36:29 +0800
Subject: [PATCH] Update _core.py

bug fix
---
 websocket/_core.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/websocket/_core.py b/websocket/_core.py
index 9297bbc..34a8eaa 100644
--- a/websocket/_core.py
+++ b/websocket/_core.py
@@ -938,7 +938,8 @@ class WebSocket(object):
                 raise
 
         if not bytes:
-            self.sock.close()
+            if self.sock:
+                self.sock.close()
             self.sock = None
             self.connected = False
             raise WebSocketConnectionClosedException()