datastax/python-driver — pull request #212 by rustyrazorblade (2014-11-14 00:57:20+00:00)
Title: allow for multiple callback and errbacks

Allow multiple callback & errbacks. Currently if you assign more than one, the first gets clobbered. This was really expected since it's called "add" and not "set".

https://datastax-oss.atlassian.net/browse/PYTHON-182