Python Memory & Reference Visualizer

Interactive Reference Semantics & Heap Graph

Execution Presets

Python Execution Tracer Shallow vs Deep Copy

Step 1 / 4

Live Reference & Equality Matrix

Expression	Identity (is)	Value (==)	Pointer Delta

Proof State Assertion

a[0] is b[0] => true

Stack Frame Ref

Heap Container (List)

Primitive Scalar

Step 1: Initialization

Initial nested list `a` created in heap memory with reference pointers to inner element lists.