Question 1

How do I add shell completion to my Typer app?

Accepted Answer

Use the --install-completion option when running your app or the typer command. Typer automatically detects the shell (Bash, Zsh, Fish, PowerShell) and installs completion scripts, making it user-friendly out of the box.

Question 2

Typer vs Click: which should I use?

Accepted Answer

Typer is better if you value type hints and minimal boilerplate for rapid development, while Click offers more low-level control. Choose Typer for modern Python practices, or Click for fine-tuned customization without abstractions.

Question 3

Can Typer handle file paths or custom validation?

Accepted Answer

Yes, Typer supports various types like paths and enums through Python type hints, and you can add custom validation. However, for complex validation, you might need to integrate with Pydantic or drop to Click for advanced logic.

Question 4

How to create subcommands in Typer?

Accepted Answer

Use the @app.command() decorator on functions within a typer.Typer() app. Each function becomes a subcommand, and you can organize them into groups, as shown in the README's multi-command example.

Question 5

Is Typer good for large CLI tools?

Accepted Answer

Yes, Typer scales well with subcommands and groups, but be mindful of dependency management and potential abstraction limitations if you need highly customized behavior beyond standard type hints.

Question 6

What happened to typer-slim?

Accepted Answer

Typer-slim is no longer supported and now installs the full Typer package. If dependency size is critical, you might use Click directly or set TYPER_USE_RICH to False to disable rich formatting.

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