Python Tutors

Introduction:

Philip J. Guo is a professor of Cognitive Science at UC San Diego, who focuses on teaching programming at interactively online. He has produced great products for both programming beginners and those interested in Python internals (10-hour lecture).

He impressed me with Python Tutors website: python tutors. Python Tutors is: Python, Java, JavaScript, TypeScript, Ruby, C and C++. Python tutors converts Python written on the left into data structures on the right. This provides a deeper view of what Python is actually doing. The diagrams are step-based, which means you can see the execution of each line of code and what happens beneath the covers. Red and Green arrows show you the line to be executed and the line being executed. An example below.