The data science is a hot topic now, so together with Piotr Chlebek and CODE:ME foundation we decided to organize a data science course. The course took place on 11-12.01.2020 in Gdańsk. The number of participants was limited, and the list of participants was full long before the date of the course. This shows a huge interest in data science and machine learning. The participants represented different professions, so it was a very interesting experience to teach them.