CLAP aims at being powerful and advanced command line interface library for Python 3 language. Having built-in support for modes, optional and obligatory options, options with arguments (with type-checking with arbitrary types) it enables programmers to create rich command line interfaces for Python 3 programs.
--log ./file.logare both correct),
floatbuilt-in and other arbitrary types via callbacks),
--point 0 0),
--quietmust not come with option
your-tool helpcommand) with per-mode, per-option, and per-operand descriptions, usage examples, and more
CLAP is not the most easy to use command line arguments parser for Python, but I am quite confident that it is one of the most powerful (if not the most powerful) framework for writing command line interfaces. With excellent support for modes, options, and operands, automatic input verification, and help screen generation you get a big return on your investment.
See the Issue project which is the flagship software for CLAP and uses all features the library offers.
RedCLAP is published under GNU GPL v3 or GNU LGPL v3 (or any later version of one of this licenses).