Hi, This post is a short overview of a stratified multi-label train-test split. Please look at the colab implementation for a step through guide. Sometimes you step into work problems, which justify a small post. I already saw colleagues struggling to balance the train-test split for multi-label classification. In classification problems, we have often a dataset with an imbalanced number of classes. In general, it is desired to keep the proportions of each label for the train and test sets as observed as in the original dataset. This stratified train-test split works well with single-label classification problems. For multi-label classification it is unclear how stratified sampling should be performed. Therefor Sechidis et al. 2011 and Szymanski and Kajdanowicz 2017 developed an algorithm to provide balanced datasets for multi-label classification. The documentation of their algorithm can be found in the scikit-multilearn package and on github. ...

Hi, This post is a summary of my implementation of the scaled-dot product attention and multi-head attention. Please have a look at the colab implementation for a step through guide. Even though this post is five years too late, the best way of reviving knowledge is to write about it. Transformers are in transforming the world via ChatGPT, Bart, or LLama. The core of the transformer architecture is the self-attention layer. There are many attention mechanisms (listed in this great post by Lilian Weng), but the scaled-dot product attention layer is used in general (Vaswani et al. 2017). For a visual explanation of the transformer, look at the great post from Jay Alammar. Please check Andrej Karpathy’s video for the full implementation of a transformer from scratch. ...

Hi, In this initial post, I want to draft the development of my FastAPI skeleton. At the beginning of my career as a Data Scientist, I ran into the typical problem of model deployment to production. In a team of two scientists, I had the chance to write a micro-service with Flask from scratch out of necessity. My first service followed strongly the example of Miguel Grinbergs great tutorial. The reason was simple, I couldn’t write proper code at this time. Besides no experience and the great help of my co-workers, I could write a production-ready micro-service in a few weeks with the following features: ...