Python Data Science Mistakes to Avoid

Most Python courses teach you how to write code that works once. This one focuses on something just as valuable but rarely taught directly: how to avoid the small, common mistakes that quietly cost data scientists hours of debugging and undermine their results. In this course you'll discover how to write cleaner, more reliable Python code, and structure it so it runs the way you intend. The lessons move through four areas, coding practices, structuring code, handling data, and machine learning, using short, practical examples you can apply immediately. You'll learn to comment and name code so collaborators can actually use it, organize and share projects cleanly, catch errors with simple tests, choose the right data structures and visualizations, clean data and address outliers, and select model features that hold up on unseen data. Whether you're new to Python or already experienced, you'll walk away with a concrete toolkit of habits that make your work faster, clearer, and more trustworthy.