And the author acknowledges that: "There are many alternatives to click and you can have a look at them if you enjoy them better. The obvious ones are optparse

And the author acknowledges that: "There are many alternatives to click and you can have a look at them if you enjoy them better. The obvious ones are optparse and argparse from the standard library. click is actually implemented as a wrapper around optparse and does not implement any parsing itself. The reason it’s not based on argparse is that argparse‘s design does not allow proper nesting of commands by design and has some deficiencies when it comes to POSIX compliant argument handling." What I love about Pocoo is they always have stellar documentation and give clear rationale - from the beginning.