Welcome to NucuLabs 👋

A blog about Programming, Cloud and Engineering! 👨‍🔬; (Blogging consistently since 2018)

Testing Tips: Avoid sleep in tests

Hi 👋, In this article I wanna show a testing tip that I’ve recently learned myself by reading Software Engineering at Google: Lessons Learned from Programming Over Time. The technique improved the way I write unit tests. When I’m writing bigger unit tests, I have execute something in the background, like for example publishing a message to a message broker, wait for the message to be published and then consume it to test that what I published is correct....

July 12, 2022 · 4 min · Denis Nuțiu

Project Showcase: Image Tagging

Hello there 👋, This is a showcase of a project I’ve been working on for the past weeks. It’s a simple cross-platform desktop application that allows you to tag images using a machine learning model that I’ve trained. It is written in C# using Avalonia UI, and it uses the FastAI library for the machine learning part, the model is then converted to ONNX. The application is available for Windows, Linux and MacOS....

September 12, 2023 · 1 min · Denis Nutiu

Convert a FastAI model to ONNX and CoreML

Hello there 👋, In this post, I will show you how to convert a FastAI model to ONNX and CoreML. Convert a FastAI model to Pytorch Before we can convert the model to ONNX format or CoreML, we need to convert it to Pytorch first. This is a simple process. Assuming that the model is trained, we need to call torch.save to export the model: from fastai.vision.all import * # learn is your FastAI Learner torch....

August 20, 2023 · 3 min · Denis Nutiu

Tracing Node.js APIs with OpenTelemetry

Hello everyone 👋, In this article, we’ll instrument a simple Node.js API with OpenTelemetry traces. OpenTelemetry is the new standard for distributed tracing and metrics. Trace data is used to monitor and troubleshoot complex distributed systems. At the end of this article, we’ll have a Node.js API that is instrumented with OpenTelemetry and we’ll be able to see the traces in Grafana Tempo: The API Let’s start by setting up our NodeJS project by installing the dependencies:...

August 7, 2023 · 7 min · Denis Nutiu

Using an ONNX Resnet model in Java

Hello everyone! 👋 This is a follow-up post to the previous one, long story short I started taking the course from fast.ai to learn more about Deep Learning. I’ve built a simple Image Tagging model using the Resnet architecture (don’t worry about the paper I did not read it, GitHub Copilot suggested it while writing this blog post). FastAI is a high-level Python library that allows you to train complex ML models really fast and efficiently....

July 4, 2023 · 7 min · Denis Nutiu

Image tagging with Deep Learning

Hello everyone 👋, I’ve been playing with FastAI and deep learning for a week or so and I’ve decided to combine my passion for software with my passion for photography. I’m working on an app or maybe a library that allows you to generate tags for a photo. For an amateur photographer like me it’s quite useful as I don’t always have inspiration to write tags for my photos and sometimes the tags I write are inconsistent....

July 2, 2023 · 3 min · Denis Nutiu

Deploy a FastAI model with FastAPI

Hello everyone 👋, In this quick post I’ll show you how to deploy a FastAI model using FastAPI. It’s a follow-up to my previous post from here and it is partially based on this FastAI lecture: Exporting the Model Before we create the API, we need to export the model as a pickle file. Add learn.export("<path>/cat_or_dog.pkl") with the full absolute export path at the end of the script: # ... learn = vision_learner(dls, resnet34, metrics=error_rate) learn....

June 21, 2023 · 2 min · Denis Nutiu

FastAI GPU Support

Hello everyone 👋, This is my first blog post about AI, it’s a quick post on how to enable GPU support for the FastAI library. I have avoided getting into AI for some time now, I thought that it would involve lots of complicated math, and I was not sure that it would be worth the effort, I did not get very good grates in my college math classes 😅....

June 20, 2023 · 3 min · Denis Nutiu

Overflowing Buckets

Hello everyone 👋, Today I want to share with you a problem I’ve encountered along my journey. The problem is fairly simple: You have a finite number of water units. You have a finite number of buckets. You need to distribute the water units into the buckets. Each bucket has a maximum capacity. When a bucket is full, the water overflows into the next two buckets by splitting evenly. You need to print the number of the buckets that are full....

June 15, 2023 · 3 min · Denis Nutiu

From Wordpress To Hugo

Introduction Hello everyone 👋, This is a quick post on how I migrated my blog from WordPress to Hugo. I will not go into details on how to install Hugo or how to use it, but I will share some of the things I learned along the way. I’ve also written a simple tool in Python to aid you in the migration process. You can find it here: https://dnutiu.github.io/jekyll-to-hugo/ Why not WordPress?...

June 5, 2023 · 3 min · Denis Nutiu