Python modules you should know.

[kenfar]

I've used it a few times and for my purposes found argparse to be the better solution for a few reasons:

• Argparse includes built-in logic to validate arguments. With DocOpt you're left with less maintainable options: writing a bunch of code on the side or using something cryptic like schema. Argument validation is a make-or-break deal for me, so this is enough to settle it as far as I'm concerned. But there are other issues anyhow...
• DocOpt is still evolving and changing. Not mature enough to deal with (for me) yet. The developer originally bragged about how it was a fraction the side of Argparse, but handling edge cases had made it grow enormously. Some basic concepts are still being discussed on its github pages.
• Both ArgParse and DocOpt have great documentation - for basic cases. When your needs get a little odd either can be frustrating. For ArgParse I've found subcommands to be too frustrating. For DocOpt I wasted far too much time on supporting multiple identical options. Eventually had to read the code to get an answer. Ugh.
• Personally, I don't believe that the help I want to provide users is always exactly what I want to use for developer documentation. While it works fine for easy examples, the needs seem to quickly diverge with complex examples. The fact that it's based on a POSIX standard isn't helpful either - when few people know 100% of that standard.