If you would like to contribute to the development of oslo's libraries, first you must take a look to this page:

https://specs.openstack.org/openstack/oslo-specs/specs/policy/contributing.html

If you would like to contribute to the development of OpenStack, you must follow the steps in this page:

http://docs.openstack.org/infra/manual/developers.html

Once those steps have been completed, changes to OpenStack should be submitted for review via the Gerrit tool, following the workflow documented at:

http://docs.openstack.org/infra/manual/developers.html#development-workflow

Pull requests submitted through GitHub will be ignored.

Bugs should be filed on Launchpad, not GitHub:

https://bugs.launchpad.net/oslo.utils