• cattrs version: 0.9.0
• Python version: 3.6.6
• Operating System: macOS

Description

I use cattrs + attrs (w/ type annotations and auto_attribs=True) + marshmallow. Marshmallow does data normalization and then the data is passed through cattr converter to be deserealized into Python objects. When the data is normalized, I already get proper "simple" types, like datetime, so I don't need another conversion.
I would like to indicate to cattrs that it should not do conversion, ideally on per field basis, not on per type basis.
Currently, I specify lambda x, _: x converter per type.

I have similar problem when I specify Union of different types. Those can be float, str, datetime and I don't need to convert them.
May be it is already possible, but I haven't found this in the docs.

typing.Any is not desirable, because then I lose my types