fix missing arg in exception message. thanks Keith Ainsworth

Fixes #559

1 files changed, 4 insertions, 2 deletions

diff --git a/redis/client.py b/redis/client.py
index 49cb204..4e7d3f2 100755
--- a/redis/client.py
+++ b/redis/client.py
@@ -3128,10 +3128,12 @@ class PubSub(object):
     def run_in_thread(self, sleep_time=0, daemon=False):
         for channel, handler in iteritems(self.channels):
             if handler is None:
-                raise PubSubError("Channel: '%s' has no handler registered")
+                raise PubSubError("Channel: '%s' has no handler registered" %
+                                  channel)
         for pattern, handler in iteritems(self.patterns):
             if handler is None:
-                raise PubSubError("Pattern: '%s' has no handler registered")
+                raise PubSubError("Pattern: '%s' has no handler registered" %
+                                  pattern)
 
         thread = PubSubWorkerThread(self, sleep_time, daemon=daemon)
         thread.start()