Automagic shell tab completion for Python CLI applications

shtab is a Python library that automatically generates shell tab completion scripts for command-line interface (CLI) applications. It processes an `argparse.ArgumentParser` object to produce completion scripts for `bash`, `zsh`, and `tcsh`. It aims for speed and correctness, avoiding the side-effects and performance issues of alternatives like `argcomplete` and `pyzshcomplete`. As of version 1.8.0, it is actively maintained by Iterative AI, with its development often driven by the needs of projects like DVC, but designed for general-purpose use.