WebSockets is a technology that allows for opening an interactive communications session between a user’s browser and a server. With this technology, a user can send messages to a server and receive event-driven responses without requiring long-polling, i.e. without having to constantly check the server for a reply. Think about when you are replying to an email in Gmail, and at the bottom of your screen you see an alert pop up saying “1 unread message from [insert some email address here]” coming from the person you were just responding to. …

What is Celery Beat? It combines Celery, a well-known task delegation tool, with a nifty scheduler called Beat. It can help you manage even the most tedious of tasks.

As we know the work of software developers is filled with generating periodic reports, handling vast imports or exports, backups, frequent API requests, or simply sending batches of emails. Wouldn’t it be a developer’s paradise to have all these tasks automated and perfectly scheduled? It would — luckily, with the help of Celery Beat.

Getting Started

To get Celery on wheels, you’ll need a broker to send and receive messages. My choice is…

Automation in Django is a developer’s dream. Tedious work such as creating database backup, reporting annual KPI, or even blasting email could be made a breeze. Through Celery — a well-known software in Python for delegating task — such action has been made possible.

Celery is a task queue based on distributed message passing. It is used to handle long running asynchronous tasks. It allows us to do things in a distributed way (i.e run things remotely so that our server doesn’t take too much time loading that process). Celery is perfectly suited for tasks which will take some time…

PostgreSQL is an advanced object-relational database management system
that supports an extended subset of the SQL standard, including
transactions, foreign keys, subqueries, triggers, user-defined types
and functions. It is also one of the most used databases in the industry for production and deployment.

Installation:

Here we’ll install PostgreSQL 9.5.11 on Ubuntu 16.04 system.

Ubuntu’s default repositories contain Postgres packages, so we can install these easily using the apt-get

sudo apt-get updatesudo apt-get install postgresql postgresql-contrib

It’ll create postgres service

➜  ~ sudo systemctl status postgresql
● postgresql.service - PostgreSQL RDBMS
   Loaded: loaded (/lib/systemd/system/postgresql.service; enabled; vendor preset: enabled)…

Redis is a versatile tool that can be very useful in our Python/Django projects.Through this blog my goal is to explain how Redis can be used in multiple different scenarios, with real examples of building counters, leaderboards, analytics’ tools, and a recommendation engine. The blog showcases practical examples of how to use Redis with Python / Django and a final demo to interact with the public. It also shows the best practices when using it with Django.

Redis is an in-memory data structure store that can be used as a caching engine. Since it keeps data in RAM, Redis can…

In many cases when there is a modification in a model’s instance we need execute some action. Django provides us an elegant way to handle these situations. The signals are utilities that allow us to associate events with actions. We can develop a function that will run when a signal calls it.

Example

The most common example of using Django signals is when we want to create a user profile as soon as the user creates his account which can be done by creating a signals.py file in your app directory with following code :~

from django.db.models.signals import post_save
from django.contrib.auth.models import…

Both the threading and multiprocessing modules in python aim to do the same thing and that is to do a number of things at the same time, however the way that threading module goes about it and the multiprocessing module goes about it is very different.

Before going deep into this topic it’s best to know what is a thread and what is a process :~

Django ships with a built-in User model for authentication, however the official Django documentation highly recommends using a custom user model for new projects. The reason is if you want to make any changes to the User model down the road–for example adding a date of birth field–using a custom user model from the beginning makes this quite easy. But if you do not, updating the default User model in an existing Django project is very, very challenging.

The brief

This post will detail how to create a custom user with email authentication and how to integrate this in your admin interface…