Overview

Typer 0.4, released on August 30, 2021, improves auto-completion and sub-command handling.

Main Features

Auto-completion

Typer 0.4 uses Click 8's new completion system for Bash, Zsh, and Fish.

python 
import typer

app = typer.Typer()

@app.command()
def greet(name: str, formal: bool = False):
    if formal:
        typer.echo(f'Hello, {name}.')
    else:
        typer.echo(f'Hi {name}!')

if __name__ == '__main__':
    app()

Sub-commands

Sub-command handling is improved with better nested group support.

python 
import typer

app = typer.Typer()
users_app = typer.Typer()
app.add_typer(users_app, name='users')

@users_app.command('list')
def list_users():
    typer.echo('Alice, Bob')

@users_app.command('add')
def add_user(name: str):
    typer.echo(f'Added: {name}')

Sources