How Flask processes HTTP requests - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import Flask and create an app instance.

Flask

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

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

Arender_template

BFlask

CRequest

Dredirect

Attempts:

3 left

💡 Hint

Common Mistakes

Importing Request instead of Flask

Forgetting to create the app instance

Flask is imported from the flask package and used to create the app instance.

2fill in blank

medium

Complete the code to define a route for the home page.

Flask

@app.route('[1]')
def home():
    return 'Hello, Flask!'

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

A/

B/home

C/index.html

D/main

Attempts:

3 left

💡 Hint

Common Mistakes

Using '/home' instead of '/' for the root route

Forgetting the leading slash

The root URL '/' is used to define the home page route in Flask.

3fill in blank

hard

Fix the error in the code to run the Flask app only when the script is executed directly.

Flask

if __name__ == [1]:
    app.run(debug=True)

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

A'__main__'

B'run'

C'app'

D'main'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'main' without underscores

Using 'app' or 'run' instead of '__main__'

The special variable __name__ equals '__main__' when the script is run directly.

4fill in blank

hard

Fill both blanks to access the HTTP method and return it in the response.

Flask

from flask import request

@app.route('/method', methods=['GET', 'POST'])
def method():
    method_used = request.[1]
    return f'Method used: [2]'

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

Amethod

Bmethod_used

Cmethod()

Dmethod_used()

Attempts:

3 left

💡 Hint

Common Mistakes

Using request.method() as if it were a function

Returning request.method directly without storing

request.method gives the HTTP method as a string. We store it in method_used and return it.

5fill in blank

hard

Fill all three blanks to extract a URL parameter and return a greeting.

Flask

@app.route('/hello/<[1]>')
def hello([2]):
    return f'Hello, [3]!'

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

Aname

Busername

Duser

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching parameter name and function argument

Using different variable names in the return string

The URL parameter is named 'name'. The function argument must match it. The greeting uses that variable.