Application factory pattern preview in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the Flask application factory function.

Flask

from flask import Flask

def create_app():
    app = Flask(__name__)
    return [1]

Drag options to blanks, or click blank then click option'

AFlask

Bapp

Ccreate_app

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Returning the Flask class instead of the app instance.

Forgetting to return anything from the function.

The function must return the Flask app instance named app.

2fill in blank

medium

Complete the code to register a blueprint inside the application factory.

Flask

from flask import Flask, Blueprint

bp = Blueprint('main', __name__)

def create_app():
    app = Flask(__name__)
    app.[1](bp)
    return app

Drag options to blanks, or click blank then click option'

Aregister_blueprint

Badd_url_rule

Crun

Dinit_app

Attempts:

3 left

💡 Hint

Common Mistakes

Using add_url_rule instead of register_blueprint.

Calling run inside the factory.

Use register_blueprint to add a blueprint to the Flask app.

3fill in blank

hard

Fix the error in the application factory by completing the code to load configuration from a file.

Flask

def create_app():
    app = Flask(__name__)
    app.config.[1]('config.py')
    return app

Drag options to blanks, or click blank then click option'

Afrom_pyfile

Bload_config

Cload_from_file

Dread_config

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent method like load_config.

Trying to assign config directly without using a method.

The correct method to load config from a file is from_pyfile.

4fill in blank

hard

Fill both blanks to create a route inside a blueprint and return a greeting.

Flask

from flask import Blueprint

bp = Blueprint('main', __name__)

@bp.route([1])
def hello():
    return [2]

Drag options to blanks, or click blank then click option'

A"/"

B"Hello, Flask!"

C"/home"

D"Welcome!"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong route path like "/home" when root is expected.

Returning a variable instead of a string.

The route decorator needs the path "/" and the function returns the greeting string "Hello, Flask!".

5fill in blank

hard

Fill all three blanks to create an application factory that registers a blueprint and loads config.

Flask

from flask import Flask, Blueprint

bp = Blueprint('main', __name__)

@bp.route("/")
def index():
    return "Welcome!"

def create_app():
    app = Flask(__name__)
    app.config.[1]('config.py')
    app.[2](bp)
    return [3]

Drag options to blanks, or click blank then click option'

Afrom_pyfile

Bregister_blueprint

Capp

Dload_config

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong method names for config loading or blueprint registration.

Forgetting to return the app instance.

The factory loads config with from_pyfile, registers the blueprint with register_blueprint, and returns the app instance.