Recommended Hostings. Cloudways: Realize Your Website's Potential With Flexible & Affordable Hosting. 24/7/365 Support, Managed Security, Automated Backups, and 24/7 Real-time Monitoring. FastComet: Fast SSD Hosting, Free Migration, Hack-Free Security, 24/7 Super Fast Support, 45 Day Money Back Guarantee. Recent Added Topics. How to loop over. Tutorial: Advanced For Loops in Python. In a previous tutorial, we covered the basics of Python for loops, looking at how to iterate through lists and lists of lists.But there’s a lot more to for loops than looping through lists, and in real-world data science work, you may want to use for loops with other data structures, including numpy arrays and pandas DataFrames.