Reuven teaches Python, data science, and Git to companies around the world. He also offers many online courses, including "Weekly Python Exercise," a community-based way to improve your Python fluency over time. Reuven writes two free, weekly newsletters — "Better developers" (about Python development, with more than 20,000 subscribers) and "Trainer weekly" (for technical trainers who want to improve their skills). Reuven is the author of "Python Workout" from Manning, and is a co-host of the "Business of Freelancing" podcast. More information about Reuven, his courses, and writing is at https://lerner.co.il/ .