Build Polished CLIs with Typer & Rich

python -m pip install "typer>=0.12" rich

from pathlib import Path
from typing import Annotated
import typer
from rich.console import Console
from rich.table import Table

app = typer.Typer(help="Inspect text files.", no_args_is_help=True)
console = Console()

@app.command()
def stats(
    path: Annotated[Path, typer.Argument(exists=True, dir_okay=False)],
    words: Annotated[bool, typer.Option("--words/--no-words")] = True,
) -> None:
    """Show line, word, and character counts."""
    text = path.read_text(encoding="utf-8")
    table = Table(title=path.name)
    table.add_column("Metric")
    table.add_column("Count", justify="right")
    table.add_row("Lines", str(len(text.splitlines())))
    if words:
        table.add_row("Words", str(len(text.split())))
    table.add_row("Characters", str(len(text)))
    console.print(table)

if __name__ == "__main__":
    app()

python texttool.py --help
python texttool.py stats README.md

# Add a console entry point in pyproject.toml:
# [project.scripts]
# texttool = "texttool:app"

# Then install your project and run it anywhere:
python -m pip install -e .
texttool stats README.md