Docopt
Docopt is a Python library for creating command-line interface (CLI) parsers by writing documentation strings (docstrings) that define the interface. It parses the docstring to automatically generate a parser that handles arguments, options, and commands based on the specified usage patterns. This approach allows developers to design and document their CLI tools simultaneously, reducing boilerplate code.
Developers should learn Docopt when building CLI applications in Python, as it simplifies argument parsing by using natural language descriptions instead of complex configuration code. It is particularly useful for tools requiring clear, human-readable documentation and quick prototyping, such as scripts, utilities, or small to medium-sized applications where maintainability and ease of use are priorities.