https://answers.launchpad.net/neutron/+question/231432
try to remove your current oslo module in system and then install: http://tarballs.openstack.org/oslo.config/oslo.config-1.2.0a2.tar.gz#egg=oslo.config-1.2.0a2.
For example:
cd .tox/py27/lib/python2.7/dist-packages/
rm -rf oslo
pip install http://tarballs.openstack.org/oslo.config/oslo.config-1.2.0a2.tar.gz#egg=oslo.config-1.2.0a2
# and then remove your .tox # I didn't do it
and then do tox -e py27
TOX Usage
返回很快的小case檢查tox是否正常
$ tox -v -epy27 neutron.tests.unit.test_api_v2:JSONV2TestCase
$ tox -v neutron.tests.unit.bigswitch.test_restproxy_plugin
$ tox -v -epy27 neutron.tests.unit.bigswitch.test_restproxy_plugin:<Class name in this file>