Metaclasses are mentioned among the most advances features of Python. Knowing how to write one is perceived like having a Python black belt. But are they useful at all outside job interviews or con...
Celery beat is a nice Celery's add-on for automatic scheduling periodic tasks (e.g. every hour). For more basic information, see part 1 - What is Celery beat and how to use it. In this part, we'...
Enthusiasm, doubt, opposition There are few possible reactions after learning about the Clean Architecture or Hexagonal Architecture (AKA Ports & Adapters) or even merely innocent service lay...
What is a mock? Mock is a category of so-called test doubles - objects that mimic the behaviour of other objects. They are meant to be used in tests to replace real implementation that for some r...
Type annotations are a formalized way to add some extra information about types to your project. Once you get through adding mypy to your project and annotate your code (remember you can do it auto...
Even after successful integration of mypy with an existing project (see mypy: how to use it in my project part 1), there are tons of code that does not have type annotations. Adding them manually i...
Type annotations are like comments Type annotations are a great addition to Python. Thanks to them, finally our IDEs are able to provide good quality autocompletion. They did not turn Python into...
High-quality code review is one of the secrets of the most effective teams. Over the years I noticed a few interesting ways to approach it. Now I share them with you in this article. Recipe 1: Su...
It is my pleasure to announce that my book is finally available to buy. :) https://leanpub.com/implementing-the-clean-architecture Free sample is available there as well. The books focuses o...
tl;dr ensure_future let's us execute a coroutine in the background, without explicitly waiting for it to finish. If we need, we can wait for it later or poll for result. In other words, this is a w...