Provide additional extras

[ekohl]

Currently there's the extra full which installs all dependencies. It would nice if I could choose just apispec and pyyaml with the correct versions. Would it be possible to provide all optional dependencies as extras?

[perdy]

Yes, it sounds reasonable to add small groups of dependencies to allow some features, such as apispec and pyyaml for schema and docs generation. I will check all combinations of dependencies and update the setup config.

Thanks !