See Python before you code it
Memory model, call stack, list internals, dictionary hash tables, OOP class hierarchies — Python's invisible machinery made visible.
Animations included
6 concepts you'll see in 3D
Each animation runs in your browser. No video player — live WebGL rendered in real time.
Python memory model
Variables as labels pointing to objects in memory. Watch what happens during assignment, mutation, and garbage collection.
Call stack visualised
Function calls stacked as frames. Local variables shown inside each frame. Watch frames push and pop during recursion.
List vs tuple internals
A list as a dynamic array that resizes. A tuple as a fixed block. Watch memory allocation as you append items.
Dictionary hash table
Keys hashed to bucket positions. Collisions resolved. Watch lookups happen in O(1) with the bucket highlighted.
Class inheritance tree
A 3D tree of classes and methods. Method resolution order (MRO) animated as a path through the tree.
Generator and iterator
A generator function animated as a paused coroutine. Each `next()` call resumes from the yield point.
UEEP model — step 1
Understand before you build
The UEEP model starts with visual understanding. These animations are the Understand step — before any code, before any exercise, the concept must click visually.
Watch the Python Programming animations
Open Animation Lab and select Python Programming to start watching. Free, no sign-up needed.