Passing config using environment variables

Hello,

I'm using Travis-CI for Continuous Integration in many projects.
I'm planning to use traitlets as a way to configure some tools (passing API_KEY, ...)

To be able to test my projects, I need to pass some settings using environnement variables (only for Continuous Integration) because it's necessary to "hide" (from Git repository) some config data (API_KEY, password...)

see http://docs.travis-ci.com/user/environment-variables/

Is it something which is possible with traitlets ?
Is it something which could be considered in traitlets ?

Kind regards

No source files, tests, or entry points are named. Start by reviewing traitlets' configuration interface and the linked Travis-CI environment-variable documentation, then define the supported configuration behavior and its security expectations. Done means the requested environment-variable configuration path is specified and covered by tests.

Scritto dal modello di indicizzazione a partire dal testo della issue.