Custom error pages (404, 500) in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Flask class from the flask module.

Flask

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

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

Arequest

Brender_template

CFlask

Dredirect

Attempts:

3 left

💡 Hint

Common Mistakes

Importing render_template instead of Flask

Using lowercase flask instead of Flask

The Flask class is imported from the flask module to create the app instance.

2fill in blank

medium

Complete the code to define a custom 404 error handler using the decorator.

Flask

@app.errorhandler([1])
def not_found(error):
    return 'Page not found', 404

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

A404

B500

C403

D400

Attempts:

3 left

💡 Hint

Common Mistakes

Using 500 instead of 404 for not found errors

Using string '404' instead of integer 404

The 404 error code means the page was not found, so the handler uses 404.

3fill in blank

hard

Fix the error in the code to return a custom 500 error page with a template.

Flask

@app.errorhandler(500)
def server_error(error):
    return [1]('500.html'), 500

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

Aredirect

Babort

Crequest

Drender_template

Attempts:

3 left

💡 Hint

Common Mistakes

Using redirect instead of render_template

Forgetting to import render_template

render_template is used to return an HTML template as a response.

4fill in blank

hard

Fill both blanks to create a 404 error handler that returns a template and status code.

Flask

@app.errorhandler([1])
def page_not_found(error):
    return [2]('404.html'), 404

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

A404

Brender_template

Credirect

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up error codes 404 and 500

Using redirect instead of render_template

The handler uses 404 for the error code and render_template to return the HTML page.

5fill in blank

hard

Fill all three blanks to create a Flask app with custom 404 and 500 error handlers returning templates.

Flask

from flask import Flask, [1]

app = Flask(__name__)

@app.errorhandler(404)
def not_found(error):
    return [2]('404.html'), 404

@app.errorhandler(500)
def server_error(error):
    return [3]('500.html'), 500

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

Arender_template

Bredirect

Dabort

Attempts:

3 left

💡 Hint

Common Mistakes

Using redirect instead of render_template

Not importing render_template

render_template is imported and used in both error handlers to return HTML pages.