[igormcsouza]

Summary

This PR adds six new comprehensive knowledge base articles covering advanced Python concepts, expanding the Python documentation with deep dives into language features and runtime behavior.

Key Changes

• Context Managers — Explains the with protocol (__enter__/__exit__), class-based and generator-based implementations using @contextmanager, exception handling semantics, and contextlib utilities like ExitStack and suppress.

• Closures and Lexical Scope — Covers the LEGB name resolution rule, how closures capture variables via cells, nonlocal/global declarations, the late-binding gotcha in loops, and practical use cases.

• Decorators — Details the @ syntax and decoration mechanics, functools.wraps best practices, decorators with arguments (three-level nesting), stacking order and execution flow, and built-in decorators like @lru_cache and @contextmanager.

• Multiple Inheritance & MRO — Explains the diamond problem, C3 linearization algorithm, how super() resolves to the next class in the MRO (not the literal parent), cooperative multiple inheritance patterns, and mixin design.

• GIL, Threading, Multiprocessing and the Memory Model — Deep dive into why the GIL exists, when it's released, why it doesn't guarantee thread-safety, comparison of threading vs. multiprocessing trade-offs, memory models for each, and guidance on choosing the right concurrency model.

• Cyclic Garbage Collector — Explains reference counting, how cycles break it, the generational GC algorithm, weak references, and practical debugging techniques for memory leaks.

Notable Details

• All articles include runnable code examples and practical gotchas.
• Cross-references link related articles (e.g., decorators → closures, context managers → metaprogramming).
• Each article concludes with key takeaways and related reading.
• The index is updated to include all new articles with brief descriptions.

https://claude.ai/code/session_01JTAb6TSso5fSPPNGoN1QiS