python-cli-patterns

# Python CLI Patterns Modern CLI development with Typer and Rich. ## Basic Typer App ```python import typer app = typer.Typer( name="myapp", help="My awesome CLI application", add_completion=True, ) @app.command() def hello( name: str = typer.Argument(..., help="Name to greet"), count: int = typer.Option(1, "--count", "-c", help="Times to greet"), loud: bool = typer.Option(False, "--loud", "-l", help="Uppercase"), ): """Say hello to someone.""" message = f"Hello, {name}!" if loud: message = message.upper() for _ in range(count): typer.echo(message) if __name__ == "__main__": app() ``` ## Command Groups ```python import typer app = typer.Typer() users_app = typer.Typer(help="User management commands") app.add_typer(users_app, name="users") @users_app.command("list") def list_users(): """List all users.""" typer.echo("Listing users...") @users_app.command("create") def create_user(name: str, email: str): """Create a new user.""" typer.echo(f"Creating user: {name} <{email}>") @app.command() def version(): """Show version.""" typer.echo("1.0.0") # Usage: myapp users list # myapp users create "John" "john@example.com" # myapp version ``` ## Rich Output ```python from rich.console import Console from rich.table import Table from rich.progress import track from rich.panel import Panel import typer console = Console() @app.command() def show_users(): """Display users...