empty exchange is called '' not None

coolamqp/cluster.py

@@ -83,7 +83,7 @@ class Cluster(object):
         from .handler import ClusterHandlerThread
         self.thread = ClusterHandlerThread(self)
 
-    def send(self, message, exchange=None, routing_key='', on_completed=None, on_failed=None):
+    def send(self, message, exchange='', routing_key='', on_completed=None, on_failed=None):
         """
         Schedule a message to be sent.
         :param message: Message object to send

setup.py

@@ -2,12 +2,6 @@
 # coding=UTF-8
 from setuptools import setup
 
-
-def reqs():
-      with open('requirements.txt', 'r') as fin:
-            return [q.strip() for q in fin.readlines() if len(q.strip()) > 0]
-
-
 setup(name='CoolAMQP',
       version='0.9',
       description='AMQP client with sane reconnects',