From 1bcb9f029d7179a23d2e008891cfb9e7f0534d64 Mon Sep 17 00:00:00 2001
From: Dana Powers <dana.powers@rd.io>
Date: Sun, 3 Jan 2016 18:17:23 -0800
Subject: [PATCH] Message value can be None

---
 kafka/protocol/message.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kafka/protocol/message.py b/kafka/protocol/message.py
index 70da5ac..2648e24 100644
--- a/kafka/protocol/message.py
+++ b/kafka/protocol/message.py
@@ -22,7 +22,7 @@ class Message(Struct):
     CODEC_SNAPPY = 0x02
 
     def __init__(self, value, key=None, magic=0, attributes=0, crc=0):
-        assert isinstance(value, bytes), 'value must be bytes'
+        assert value is None or isinstance(value, bytes), 'value must be bytes'
         assert key is None or isinstance(key, bytes), 'key must be bytes'
         self.crc = crc
         self.magic = magic