import click

@click.group()
def dataset_cli():
    """Commands for managing datasets."""
    pass

@dataset_cli.command()
def list():
    """List all datasets."""
    # Example placeholder logic for listing datasets
    click.echo("Datasets: dataset1, dataset2, dataset3")

@dataset_cli.command()
@click.argument('dataset_name')
@click.option('--file-path', required=True, help='Path to the dataset file')
def add(dataset_name, file_path):
    """Add a new dataset."""
    # Example placeholder logic for adding a dataset
    click.echo(f"Dataset '{dataset_name}' has been added from '{file_path}'.")

@dataset_cli.command()
@click.argument('dataset_name')
def delete(dataset_name):
    """Delete an existing dataset."""
    # Example placeholder logic for deleting a dataset
    click.echo(f"Dataset '{dataset_name}' has been deleted.")
