Flask Framework Cookbook - Second Edition

How to do it...

Create a method that is decorated with errorhandler() and renders the 404.html template whenever the 404 Not Found error occurs:

@app.errorhandler(404) 
def page_not_found(e): 
    return render_template('404.html'), 404 

The following lines of code represent the flask_catalog_template/my_app/templates/404.html template, which is rendered in case of 404 errors:

{% extends 'home.html' %} 
 
{% block container %} 
  <div class="top-pad"> 
    <h3>Hola Friend! Looks like in your quest you have reached a        location which does not exist yet.</h3> 
    <h4>To continue, either check your map location (URL) or go        back <a href="{{ url_for('catalog.home') }}">home</a></h4> 
  </div> 
{% endblock %}