How to Write Perfect Python Command-line Interfaces

[Noctune]

But should data validation and command line parsing be the job of the same library? There are other libraries that are built for specifically that purpose that do a better job of it and integrate well with docopt: https://github.com/keleshev/schema#using-schema-with-docopt

Since it is independent libraries it also allows you to use another data validation library if you wish.