David Beazley is one of the most authoritative independent voices on the Python language, author of the Python Cookbook (O'Reilly), Python Distilled, and the long-running PyCon tutorial series that has shaped how serious Python engineers think about the language. He has been teaching Python continuously since the late 1990s.
His CourseFlix listing carries four David Beazley courses: Advanced Programming with Python, the Crusty Interpreter (a Rust implementation exercise), Write a Compiler, and the Rafting Trip retreat-style intensive. The teaching style is unusually rigorous about the language and the foundational CS topics underneath it — David's courses are taught at the level of someone who has implemented Python interpreters and language tooling for decades.
Material is paid and aimed at experienced Python developers ready to study the language at depth. For broader content, see CourseFlix's Python category page.