Command pattern with Flask CLI - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the Command pattern in the context of Flask CLI?

The Command pattern organizes code into separate commands that can be run from the command line using Flask CLI. Each command is a small, focused task you can run easily.

beginner

How do you create a custom command in Flask CLI?

You create a function decorated with @app.cli.command(). This function runs when you type the command name in the terminal.

intermediate

Why use the Command pattern with Flask CLI?

It helps keep your code clean by separating tasks like database setup, testing, or data import into easy-to-run commands.

intermediate

What decorator is used to add arguments to a Flask CLI command?

You use @click.argument or @click.option decorators to add arguments or options to your command functions.

beginner

How does Flask CLI find and run your custom commands?

Flask CLI looks for functions decorated with @app.cli.command() in your app code and makes them available as commands you can run in the terminal.

Which decorator do you use to create a new Flask CLI command?

A @app.cli.command()

B @app.route()

C @click.command()

D @flask.command()

Use @app.cli.command() to define a new CLI command in Flask.

What Python package does Flask CLI use under the hood for command line parsing?

A argparse

B click

C optparse

D sys

Flask CLI uses the 'click' package to handle command line arguments and options.

How do you add an argument to a Flask CLI command?

A Using @click.argument()

B Using @app.argument()

C Using @app.cli.argument()

D Using @flask.argument()

Arguments are added with the @click.argument() decorator.

What is the main benefit of using the Command pattern with Flask CLI?

A To style HTML templates

B To create web routes

C To organize command line tasks cleanly

D To manage database migrations automatically

The Command pattern helps organize command line tasks into clear, reusable commands.

Which command runs your Flask CLI commands?

A python flask.py

B flask run

C python manage.py

D flask <command-name>

You run custom commands with 'flask ' in the terminal.

Explain how to create and run a custom command using Flask CLI.

Think about how Flask CLI connects your Python function to a terminal command.

Describe the advantages of using the Command pattern in Flask CLI for your projects.

Consider how breaking tasks into commands helps in real-life project work.