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I personally stick with plain old argparse for 90% of my command line python apps, but when I need something with more utility/higher abstractions I reach for Click as the author mentions. Click is in a sweet spot in my opinion.

A new package that is interesting is Nubia, by Facebook. You can create interactive shells or use it as a traditional CLI. However, it currently supports only python 3.6/7, I believe, and getting started with it could be challenging as there currently aren't complete docs. The source code is fairly easy to read, however, and it's intuitive after a point.

Click is like really smooth. It just clicked for me.