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Learn Python asyncio.Barrier to synchronize tasks in phases, coordinate pipelines, avoid races, and handle cancellation safely.

Learn Python dataclasses.KW_ONLY to require named arguments, prevent ambiguous calls, and evolve public APIs more safely.

Learn Python operator.methodcaller for map, sorted, callbacks, arguments, reusable transformations, and clearer declarative pipelines.

Learn how to traverse directories with pathlib.Path.walk in Python, filter files, skip folders, handle errors, and avoid common pitfalls.

Learn Python enum.verify to validate unique values, continuous sequences, and named flags with explicit enum rules.

Learn Python TopologicalSorter to order dependencies, detect cycles, and run sequential or parallel pipelines safely.

Learn Python os.fwalk to traverse directories with file descriptors, reduce race conditions, and handle files more safely.

Learn Python typing.override for safer method overrides, compatible signatures, inheritance contracts, and reliable refactoring.