No handlers could be found for logger “bzr”

This usually just means you don’t have permission to write to the log. Sometimes it ends up belonging to root (maybe because I did sudo bzr in /etc using etckeeper?). Just do:

$ sudo chown $USER ~/.bzr.log
$ chmod 644 ~/.bzr.log

source: http://procrastiblog.com/2010/01/03/no-handlers-could-be-found-for-logger-bzr/