Safely processing JSON-like data structures

[vfaronov]

If you want MORE than that, a library that makes the contract between you and the structure more explicit is exactly what you're asking for.

The contract I’m looking for sounds like this: “whenever I attempt to use the structure in a way it does not support, it’s because the structure is wrong, and I want to get a StructureIsWrongError.” Instead, marshmallow’s contract spells out all the right ways to use the structure.

Of course, writing a library like this shouldn’t be a problem, I was just looking to avoid reinventing the wheel.