CLI

Composable Python package for creating beautiful command-line interfaces with minimal code (options, prompts, subcommands).

Python's built-in command-line parsing library (standard library); supports options, flags, subcommands, type conversion, and help text.

Type-hint-driven CLI framework from the FastAPI author — automatic help, completion, and validation from Python type annotations.

Google's library for automatically generating CLIs from any Python object — turns functions, classes, or modules into command-line tools.