Click Framework

Introduction

Click is a composable command-line interface creation library with simple syntax.

Basic Command

import click

@click.command()
@click.argument("name")
def hello(name):
    click.echo(f"Hello, {name}!")

if __name__ == "__main__":
    hello()

Options and Flags

import click

@click.command()
@click.option("--count", "-c", default=1, help="Number of greetings")
@click.option("--shout", is_flag=True, help="Shout")
@click.argument("name")
def hello(count, shout, name):
    for _ in range(count):
        msg = f"Hello, {name}!"
        if shout:
            msg = msg.upper()
        click.echo(msg)

Prompts

import click

name = click.prompt("Enter your name", default="Anonymous")
if click.confirm("Continue?"):
    click.echo("Continuing...")

Practice Problems

1. Create CLI with multiple commands
2. Add option flags
3. Use prompts for user input
4. Build menu-based CLI
5. Colorize output