I'm a contributor to the hug project.

we are currently working on a way of doing this which should be released to the development version this week and will be released with version 2.0

basically the modification would allow you to create a new type which has multiple predefined fields. like so:

    class User(Type):
        username = Chain(text, LongerThan(10))
        password = Chain(text, LongerThan(10))

After creating this type you could then use it as a type as normal

    def stuff(arg1: int, arg2: User):
        return 'Ok'

May I make a suggestion? Please, PLEASE use a standardized Python modeling tool like Schematics, Marshmallow, etc. as your description language. Then your users can use the same models for their REST framework as for their ORM and everything else.

I'm begging: please do not reinvent this. Just don't.

kstrauser: Hug supports marshmallow! Right now, you can use Marshmallow types out of the box for any API call just set the Marshmallow type as the type after the annotation and it will work and validate as expected :)

Excellent, thanks!