Satori Komeiji's Programming Classroom

Sep 25, 2024 · Fundamentals

Understanding Python .pyc Files: How They Are Generated, Structured, and Imported

This article explains why and when Python creates .pyc files, shows how to compile them manually with py_compile, demonstrates importing compiled bytecode via importlib, dissects the .pyc file header and payload, and explores the CPython marshal implementation and simple bytecode obfuscation techniques.