Typer

Use it when

• You keep hand-rolling argparse boilerplate and help text for every internal Python script
• A team script needs to behave like a real CLI with automatic --help, subcommands, and shell completion for Bash, Zsh, Fish, and PowerShell

What it solves

Not the fit when

• Non-Python stacks
• Interactive full-screen terminal interfaces
• Packaging or distributing standalone binaries
• Assuming completion is active merely because the library is installed; packaged CLIs use `--install-completion`, while the companion `typer` command provides completion after the project environment is activated
• building web APIs
• interactive full-screen terminal UIs
• packaging or distributing binaries

Install

uv add typer (or pip install typer in a virtual environment)

Invoke

import typer; app = typer.Typer(); decorate functions with @app.command() and call app() - typed parameters become CLI arguments and options with automatic --help and shell completion; or run any script as a CLI with: typer main.py run

Alternatives

No reviewed alternatives recorded yet.