django - message publishing using kombu - TypeError 'str' object is not callable -

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after encoding message payload json, i'm attempting publish broker with:

connection = establish_connection() producer = producer(channel=connection,                       exchange="inbound",                       routing_key="apisubmit")  producer.publish(body=pl,headers={"api_access_key": "xxxx", "client_id": 4, "object_type": "location", "action": "c"})

django returning following:

traceback: file "/usr/local/pythonenv/openblock/lib/python2.6/site-packages/django-1.3.1-py2.6.egg/django/core/handlers/base.py" in get_response   111.                         response = callback(request, *callback_args, **callback_kwargs) file "/usr/local/pythonenv/openblock/src/myblock/myblock/barz/views.py" in testtwo   19.     msg=publish_kombu() file "/usr/local/pythonenv/openblock/src/myblock/myblock/barz/messaging.py" in publish_kombu   99.                           routing_key="apisubmit") file "/usr/local/lib/python2.6/dist-packages/kombu/messaging.py" in __init__   82.         self.exchange = self.exchange(self.channel)  exception type: typeerror @ /barz/publish_kombu/ exception value: 'str' object not callable

producer.exchange must exchange. default it's exchange(""), somehow must have set string.


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