Satori Komeiji's Programming Classroom

Oct 18, 2024 · Fundamentals

How Python’s Virtual Machine Executes Bytecode: Step‑by‑Step Process

This article explains how the Python interpreter, after runtime initialization, creates a stack frame, invokes a series of C functions such as PyEval_EvalCode, _PyEval_Vector, and _PyEval_EvalFrameDefault to traverse and execute bytecode, and details the underlying runtime stack structures and macro APIs that support instruction evaluation.