From Fedora Project Wiki
Blivet
Blivet is a python module for management of a system's storage configuration. It is used by Anaconda, Fedora's OS installer and used to exist as pyanaconda.storage.
The upstream git repository is here.
Documentation
You can build documentation from a blivet git clone, or you can look at the (often outdated) version I have here
FAQ
What's with the name?
The blivet is an optical illusion that displays two irreconcilable perspectives at once. This is apropos to a fully functional storage library in that the goal of clean, consistent design is virtually irreconcilable with the tangle of inconsistent storage technologies that must be managed.
But the term "blivet" has a negative connotation as well. Shouldn't you pick a different name?
No. If you don't have a sense of humor you must develop thicker skin. Seriously.