Command-line interface (CLI) applications are essential tools in the software development world, providing a simple way to interact with applications, scripts, or services.
Python, known for its simplicity and readability, offers excellent libraries for building CLI applications, one of which is Click.
Click is a Python package for creating beautiful command-line interfaces in a composable way with as little code as necessary.
It's a modern alternative to argparse, providing a cleaner API and more functionality out of the box.
In this example, we'll create a basic CLI application using Click to demonstrate its ease of use and flexibility.
Setting Up
First, ensure you have Click installed. If not, you can install it using pip:
pip install click
A Simple CLI Application
We'll create a simple CLI tool that greets the user. The application will accept the user's name as an argument and an optional flag to shout the greeting.
import click
@click.command()
@click.option('--shout', is_flag=True, help="Shout the greeting.")
@click.argument('name')
def greet(name, shout):
"""Simple program that greets NAME."""
message = f"Hello, {name}!"
if shout:
click.echo(message.upper())
else:
click.echo(message)
if __name__ == '__main__':
greet()
Full article at: https://developer-service.blog/build-cli-apps-with-ease-using-pythons-click-library/