preface is a set of basic utility functions that I'd like to be global in Python, and some utility types. Stuff like getting any element from a set, flattening a list, etc.
These functions should be appropriately named but also not conflict with other names in the global space.
The name is a joke based on Haskell's prelude.
There is also a SumType that's useful for defining Python enums is an easier manner.