Explicit is Better than Implicit - Part 2: Behaviors
“Explicit is better than implicit” is one of my favorite lines from the Zen of Python. In essence, this guiding principle encourages clarity in code by favor...
Python
Explicit is Better than Implicit - Part 1: Intentions
“Explicit is better than implicit” is one of my favorite lines from the Zen of Python. In essence, this guiding principle encourages clarity in code by favor...
Code Coverage: Misusage and Proper Usage
TL;DRs Blindly aiming for high coverage can degrade test quality as developers may prioritize increasing coverage metrics over writing meaningful, effecti...
Exposing Applications Running in EKS Cluster for External Access
To expose applications running in a Kubernetes cluster in the cloud, you need an additional component to facilitate external access. For clusters in AWS, AWS...
Building Faceted Search using Elasticsearch
Faceted search Faceted search is a type of search that enables users to narrow down search results by applying multiple filters based on predefined facets, w...
Dependency Injection and Dependency Inversion
Dependency injection and dependency inversion are two terms that often come together but serve distinct meanings and purposes.
Preventing Flaky Tests and Brittle Tests
Flaky tests and brittle tests are two common pitfalls that make our tests unreliable and hard to maintain. In this post, I will illustrate these concepts wit...
Provision an Amazon EKS cluster with AWS CDK
Amazon EKS (Elastic Kubernetes Service) is a fully managed Kubernetes service that simplifies building, securing, operating, and maintaining Kubernetes clust...
Memory Profiling CPython Applications with Memray
Memory management in modern programming languages is well-abstracted away from programmers. We do not have direct control over how our programs allocate and ...
Property Based Testing with Hypothesis
What is Property Based Testing? Property based testing, which is known to be originated by QuickCheck, is a testing technique which randomly generates test c...
Building a Serverless Function using Amazon API Gateway and AWS Lambda
This post is a quick tutorial to build a very simple serverless function using Amazon API Gateway and AWS Lambda.
Consumer-Driven Contract Testing with Pact
Consumer-driven contract testing (or CDC for short) is a testing methodology that ensures that providers are compatible with the expectations that the consum...
Single Responsibility Principle - Explained with Examples
(This post was last updated on December 13, 2024.)
Creating a VPC with AWS CDK: A Guide for Former CloudFormation Users
The AWS CDK(Cloud Development Kit) is an open-source framework to provision and manage the cloud resources using familiar programming languages.
Redlock: Distributed Lock Manager with Redis
A couple years ago, I discovered an issue caused by a race condition that occured in the backend application I was maintaining. So I implemented a simple dis...
Liskov Substitution Principle and Circle-ellipse Problem
The circle-ellipse problem, or square–rectangle problem, illustrates a limitation of OOP (object-oriented programming). Specifically, it violates the Liskov ...
Python Descriptors
A descriptor in Python is a class attribute which defines any of the special methods: __get__(self, obj, owner=None) -> value __set__(self, obj, valu...
Peformance Comparison between Flask and Sanic
Flask and Sanic Flask is one of the most popular micro web frameworks written in Python and I love using it for developing a wide range of web services becau...