Let’s see if we can use PIL to crop model images and resize them to a 2:3 ratio using Python Image Library (PIL). When all images on an overview are the same ratio, the overview looks way nicer. And… let’s try to make the model on the image, the center of the image.
Read the article Cropping model images using PIL
When working with images in a Python notebook I like to visualize them on a grid. Just calling display is not enough as it renders the images underneath each other. Let’s use Matplotlib to generate a single image with an image grid on it.
Read the article Plotting a grid of PIL images in Jupyter
This week I needed to query an ElastiCache instance on AWS – which is Amazons version of Redis. I could not find a decent free client to query this remote dictionary, so I ended up using redis-cli on Ubuntu. Turns out: Redis is a wonderful and powerful system to work with.
Read the article Connect to AWS ElastiCache (Redis) with redis-cli
Today I had some data coming into our event driven landscape, so I needed to know when my data was processed. As it constituted the processing of 400.000+ records (and I had more things to do), I needed a small script that kept an eye on my JSON API endpoint to see if the values are changed.
Read the article Poll JSON endpoint until value changes with bash & curl
I’ve tried to use the ngrok npm package in my application, but as the documentation says: “The ngrok and all tunnels will be killed when node process is done.” I need the process to “survive” my application. Let’s see what we can do about that…
Read the article Incorporate free ngrok in your Node.js application for local development
I love attribute validation! They can be used for all kinds of things. In ASP.NET Core we use them to validate models that come into our controllers. In one of our projects we kept running into the same thing: we need to validate a value against an array of pre-defined values. So we wrote some base validation attributes.
Read the article “Is One Of” and “Is Not One Of” validation attributes
I imagine your first thought is: why? Well, at Wehkamp we do a lot of cross platform development, but sometimes we end up with shell scripts that do stuff with Docker and Python. Usually that’s not a problem for Mac, but for Windows it’s a different thing. I have a MacBook Pro, but I’m a .NET developer, that’s why I prefer Windows, so I run Bootcamp. This article will show how to do Python development in the Windows Subsystem for Linux (WSL) using Visual Studio Code and Docker.
Read the article Visual Studio Code + Docker + Python using WSL in Windows on Boot Camp
This week we’ve been looking at joining two huge tables in Spark into a single table. It turns out that it is not a straightforward exercise to join data based on an array of IDs. In this blog I’ll show one way of doing this.
Read the article Spark: replace array with IDs with values; or: how to join objects?
Today I helped my neighbour to set up her new Honeywell T6 thermostat on a 2.4GHz Wi-Fi. It did not go well… Turned out that the setup does not work on Samsung devices.
Read the article Fix: stuck in Wi-Fi setup Honeywell T6 installation on Samsung
My Synology disk crashed and so did my Docker set up. Basically, the CI/CD pipeline for my programs no longer existed. The wonderful thing of an awful crash like this, is that I could rethink my setup. The result is what I would call “a poor man’s CI/CD”. It’s just Git, Docker, Docker Compose and Cron. It is easy to set up and it might be all you need.
Read the article Docker on Synology: from git to running container; the easy way