I was just listening to Theo's pledge presentation (https://www.youtube.com/watch?v=F_7S1eqKsFk) and immediately wondered how this is applied to scripting languages.

The github link for Python seems to be a high-level wrapping of the entire Python environment itself. I was wondering if there is a way to surface pledge in an environment such as Python so that a developer could drop privileges, for example, open files for writing and then drop the privilege to open any further files.