Error handling in production in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Flask function used to render templates for error pages.

Flask

from flask import Flask, [1]

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

Aerrorhandler

Babort

Crequest

Drender_template

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'errorhandler', which cannot be directly imported from Flask.

Importing 'abort' instead of 'render_template'.

The render_template function is used to render custom error pages in Flask.

2fill in blank

medium

Complete the code to create a custom 404 error handler function.

Flask

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

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

Aerrorhandler

Broute

Cbefore_request

Dafter_request

Attempts:

3 left

💡 Hint

Common Mistakes

Using @app.route instead of @app.errorhandler.

Using request lifecycle decorators like before_request.

The errorhandler decorator registers a function to handle specific HTTP errors like 404.

3fill in blank

hard

Fix the error in the code to return a custom HTML template for 500 errors.

Flask

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

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

Aredirect

Brender_template

Cabort

Drequest

Attempts:

3 left

💡 Hint

Common Mistakes

Using abort instead of render_template.

Trying to redirect instead of rendering a page.

The render_template function renders an HTML file as a response.

4fill in blank

hard

Fill both blanks to log errors and return a JSON response in production.

Flask

import logging

@app.errorhandler(500)
def internal_error(error):
    app.logger.[1]('Server Error: %s', error)
    return {'error': 'Internal Server Error'}, [2]

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

Aerror

B500

Cwarning

D404

Attempts:

3 left

💡 Hint

Common Mistakes

Logging with 'warning' instead of 'error'.

Returning wrong HTTP status code like 404.

Use app.logger.error to log errors and return HTTP status code 500 for server errors.

5fill in blank

hard

Fill all three blanks to create a custom error handler that logs, renders a template, and returns the correct status code.

Flask

import logging

@app.errorhandler([1])
def handle_error(error):
    app.logger.[2]('Error occurred: %s', error)
    return [3]('error.html'), [1]

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

A404

Berror

Crender_template

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up error codes 404 and 500.

Using wrong logging level or function to render template.

For a 500 error, log with error level, render the 'error.html' template, and return status 500.