Towards Data Science is a community-powered publication that showcases work in data science, machine learning and artificial intelligence. Every day newcomers, seasoned researchers and industry practitioners publish tutorials, research notes and real-world case studies that help the field move forward.

Towards Data Science

A foundational review of Python programming basics—expressions, variables, and functions—designed to prepare readers for building data visualizations. Covers core syntax and concepts, then explains why Python is essential for data visualization work, highlighting its accessibility, rich library ecosystem (Matplotlib, Seaborn, Plotly, Altair), seamless pandas integration, and ability to create shareable applications with tools like Streamlit and Plotly Dash.

Data Visualization Explained (Part 4): A Review of Python Essentials

The Basics—Expressions, Variables, Functions