Flask vs Django decision - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a basic Flask app that returns 'Hello World!'.

Flask

from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return [1]

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

Aprint('Hello World!')

BHello World!

C'Hello World!'

Dreturn 'Hello World!'

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the string.

Using print instead of return.

The Flask route function must return a string. The correct return value is a string literal 'Hello World!'.

2fill in blank

medium

Complete the code to import Django's HttpResponse class.

Flask

from django.http import [1]

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

AHttpResponse

BHttpServer

CHttpHandler

DHttpRequest

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing HttpRequest with HttpResponse.

Using incorrect class names.

Django's HttpResponse class is used to send HTTP responses back to the browser.

3fill in blank

hard

Fix the error in this Flask route decorator to respond to the URL '/welcome'.

Flask

@app.route([1])
def welcome():
    return 'Welcome!'

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

A'/welcome'

B'welcome'

C/welcome

Dwelcome

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the leading slash.

Not using quotes around the path.

The route decorator requires the URL path as a string starting with a slash '/'.

4fill in blank

hard

Fill both blanks to create a Django view that returns 'Hello Django!'.

Flask

from django.http import [1]

def hello(request):
    return [2]('Hello Django!')

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

AHttpResponse

BHttpRequest

DHttpServer

Attempts:

3 left

💡 Hint

Common Mistakes

Importing HttpRequest instead of HttpResponse.

Returning a string directly instead of an HttpResponse object.

The Django view must import HttpResponse and return an HttpResponse object with the string.

5fill in blank

hard

Fill all three blanks to create a Flask app with a route '/greet' that returns 'Greetings!'.

Flask

from flask import [1]
app = [2](__name__)

@app.route([3])
def greet():
    return 'Greetings!'

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

AFlask

C'/greet'

Drequest

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'request' instead of 'Flask'.

Not using quotes around the route path.

Import Flask from flask, create app with Flask(__name__), and set route with '/greet'.

Practice

1. Which framework is best suited for a beginner who wants to learn web development step-by-step with a simple app?

easy

A. Angular

B. Django

C. React

D. Flask

Solution

1. Step 1: Understand beginner needs

   A beginner usually needs a simple, easy-to-understand framework to learn web development basics.

2. Step 2: Match framework to needs

   Flask is lightweight and simple, perfect for learning step-by-step, unlike Django which is more complex.

3. Final Answer:

   Flask -> Option D

4. Quick Check:

   Simple beginner app = Flask [OK]

Hint: Simple and small apps? Pick Flask [OK]

Common Mistakes:

• Choosing Django for simple beginner apps
• Confusing Flask with frontend frameworks
• Thinking React or Angular are backend frameworks

2. Which of the following is the correct way to start a basic Flask app?

easy

A. from flask import Flask
app = Flask()

@app.route('/')
def home():
return 'Hello World!'

B. import django
app = django.App()

@app.route('/')
def home():
return 'Hello World!'

C. from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
return 'Hello World!'

D. from flask import Flask
app = Flask(__file__)

@app.route('/')
def home():
return 'Hello World!'

Solution

1. Step 1: Check Flask app initialization

   Flask apps require passing __name__ to Flask() for correct setup.

2. Step 2: Verify route and function syntax

   from flask import Flask app = Flask(__name__) @app.route('/') def home(): return 'Hello World!' correctly imports Flask, initializes app with __name__, and defines a route with a function returning a string.

3. Final Answer:

   Correct Flask app start with __name__ -> Option C

4. Quick Check:

   Flask(__name__) is correct app init [OK]

Hint: Flask app needs Flask(__name__) to start [OK]

Common Mistakes:

• Using Flask() without __name__
• Confusing Django import with Flask
• Passing wrong argument like __file__

3. Given this Flask app code, what will be the output when accessing the root URL /?

from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return 'Welcome to Flask!'

medium

A. Welcome to Flask!

B. Empty page

C. 500 Internal Server Error

D. 404 Not Found error

Solution

1. Step 1: Analyze route decorator

   The route '/' is defined and linked to the home() function.

2. Step 2: Check function return value

   The home() function returns the string 'Welcome to Flask!'. Flask sends this as the response body.

3. Final Answer:

   Welcome to Flask! -> Option A

4. Quick Check:

   Route '/' returns string output [OK]

Hint: Route '/' returns function's string output [OK]

Common Mistakes:

• Expecting error instead of string output
• Confusing route URL with function name
• Thinking Flask returns empty page by default

4. You wrote this Flask code but get an error when running it:

from flask import Flask
app = Flask(__name__)

@app.route('/hello')
def hello():
print('Hello World!')

What is the main issue causing the error?

medium

A. Indentation error inside the function

B. Missing parentheses in print statement

C. Route decorator syntax is wrong

D. Flask app not initialized properly

Solution

1. Step 1: Check function body indentation

   Python requires the function body to be indented; here, print is not indented.

2. Step 2: Confirm other syntax correctness

   Print statement has parentheses (Python 3), route decorator syntax and app initialization are correct.

3. Final Answer:

   Indentation error inside the function -> Option A

4. Quick Check:

   Python needs indented function bodies [OK]

Hint: Check indentation inside functions for errors [OK]

Common Mistakes:

• Assuming print needs fixing in Python 3
• Blaming route decorator syntax
• Thinking Flask app init is wrong

5. You want to build a web app with user login, admin panel, and database management. Which framework should you choose and why?

hard

A. Flask, because it has built-in admin and user authentication

B. Django, because it provides built-in admin, user auth, and database tools

C. Flask, because it is heavier and has more features out of the box

D. Django, because it is lightweight and minimal for small apps

Solution

1. Step 1: Identify project needs

   The app needs user login, admin panel, and database management, which require many built-in features.

2. Step 2: Match framework features

   Django offers built-in admin interface, user authentication, and ORM for database management, making it ideal for this.

3. Final Answer:

   Django, because it provides built-in admin, user auth, and database tools -> Option B

4. Quick Check:

   Big apps with admin need Django [OK]

Hint: Big apps with admin? Choose Django [OK]

Common Mistakes:

• Choosing Flask for built-in admin features
• Thinking Flask is heavier than Django
• Confusing Django as minimal for small apps