What not to do, and how to do it
summary
Explains concrete behaviors: locals() vs globals() — locals returns a snapshot that doesn’t update fast locals while globals returns the module dict; uses inspect.currentframe and code objects to read the call stack, compare code objects and local names to allow attribute writes only from __init__ (it works but fails with closures and some inheritance patterns); disassembles and rewrites co_code to implement bytecode patching for goto and switch, a ~200‑line implementation that runs but is fragile across Python bytecode changes.
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chapters (7)
- 0:00Intro
- 1:25Local variables
- 4:40Cole stack
- 8:53immutable objects
- 13:35goto statements
- 14:25disassemble
- 19:25QA
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