From e249267ff931b945583f43705c0efe3d7f7faab4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20R=C3=B8sdal?= <andreas.rosdal@gmail.com>
Date: Wed, 8 Mar 2017 21:20:32 +0100
Subject: [PATCH] Make compression options argument optional.

---
 tornado/websocket.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tornado/websocket.py b/tornado/websocket.py
index 78549c61..8364a871 100644
--- a/tornado/websocket.py
+++ b/tornado/websocket.py
@@ -689,7 +689,7 @@ class WebSocketProtocol13(WebSocketProtocol):
             else:
                 raise ValueError("unsupported extension %r", ext)
 
-    def _get_compressor_options(self, side, agreed_parameters, compression_options):
+    def _get_compressor_options(self, side, agreed_parameters, compression_options=None):
         """Converts a websocket agreed_parameters set to keyword arguments
         for our compressor objects.
         """