Satori Komeiji's Programming Classroom

Nov 25, 2024 · Fundamentals

How Does Python Implement Closures? A Deep Dive into Bytecode and localsplus

This article explains the inner workings of Python closures by tracing how nested functions are compiled into bytecode, how the CPython VM creates cell objects, binds them via the func_closure field, and stores variables in the localsplus array for static access.