If you save this code to cli.py:
importtyperapp=typer.Typer()@app.command()defcreate():"""Creates a user"""typer.echoint("Creating user")@app.command()defdelete():"""Deletes a user"""typer.echo("Deleting user")if__name__=="__main__":app()and run it you get:
$pythoncli.pyUsage:cli.py[OPTIONS]COMMAND[ARGS]...Try'cli.py --help'forhelp.╭─Error────────────╮│Missingcommand.│╰────────────────────╯That's not bad, but it forces you to request help before doing anything. Here's how it can be made so much better through the @app.callback command. See below:
importtyperapp=typer.Typer()# Setup the helper default@app.callback(invoke_without_command=True)defhelper(ctx:typer.Context):""" Awesome CLI app"""ifctx.invoked_subcommandisNone:typer.echo(ctx.get_help())@app.command()defcreate():"""Creates a user"""typer.echoint("Creating user")@app.command()defdelete():"""Deletes a user"""typer.echo("Deleting user")if__name__=="__main__":app()Now we get something as a default that really shows off the charm of typer:
$pythoncli.pyUsage:cli.py[OPTIONS]COMMAND[ARGS]...AwesomeCLIapp╭─Options─────────────────────────────────────────────────────────────────────────────────────────────────────╮│--install-completion Install completion for the current shell. ││--show-completion Show completion for the current shell, to copy it or customize the installation.││--help Show this message and exit. │╰───────────────────────────────────────────────────────────────────────────────────────────────────────────────╯╭─Commands──────────────╮│createCreatesauser││deleteDeletesauser│╰─────────────────────────╯