Install django-extensions and use runserver_plus, which is more convenient than runserver

Thing you want to do

Debug on the Django error screen (browser). Enables the use of interactive shells.

⇣

Use the libraries django-extensions and Werkzeug.

What are django-extensions?

django-extensions extends the functionality of manage.py, and there are many other commands.

• Documentation
• Repository

What is Werkzeug?

Werkzeug is a comprehensive WSGI web application library. It started out as a simple collection of various utilities for WSGI applications and has become one of the most advanced WSGI utility libraries.

https://werkzeug.palletsprojects.com/en/1.0.x/

It's something that makes WSGI easy to use.

What is WSGI?

WSGI [1] is not a server, Python module, framework, API, or any kind of software. This is just an interface specification for the server and application to communicate.

http://wsgi.tutorial.codepoint.net/intro

It seems that there was a purpose to unify the interface because various communication standards of Python came out and there were different communication standards.

Installation

Install

$ pip install django-extensions Werkzeug

Just add to settings.py

pj_name/settings.py

.
.
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    'django_extensions', # <-Postscript
]
.
.

code

For example, in a view that just displays the string ‘test’

views.py

from django.shortcuts import render
from django.http import HttpResponse


def test(request):
    message = 'test'
    return HttpResponse(message)

If you mistype the variable message as mesage ⇣

views.py

from django.shortcuts import render
from django.http import HttpResponse


def test(request):
    message = 'test'
    return HttpResponse(mesage) # <-Typo

Run

runserver

First, run the usual runserver.

$ python manage.py runserver

Go to http://127.0.0.1:8000/. Such an error screen.

runserver_plus

Now run runserver_plus. Just change runserver to runserver_plus. You will use the Debugger PIN later.

$ python manage.py runserver_plus

...
 * Debugger is active!
 * Debugger PIN: 125-696-991 # <-this

It looks like this with runserver_plus.

Mouse over the code area and a terminal icon will appear. Click it.

Enter your Debugger PIN

You will be able to use an interactive shell.

The end

Thank you for reading until the end.