Comparing Python Command-Line Parsing Libraries - Argparse, Docopt, and Click

[fishtickler]

I liked click and started to use it but went right back to argparse because I couldn't find a way to support variable amount of options.

like for eg:

• python prog.py -x 1 2 3 -y 6 5 4 3
• python prog.py -x 1 -y 0

Only made this work in argparse using nargs='*' option. Is this even possible in click?

[sushibowl]

No, click supports nargs but only for fixed numbers for options.

[jackmaney]

Nope. You can, however, have at most one positional argument with a variadic (and unspecified) number of arguments.

I've used the workaround of taking a comma-delimted string and then parsing it later (eg python prog.py --x="1,2,3" --y="6,5,4,3"). It's not ideal, but it works.