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Vectorization processes entire arrays of data simultaneously using CPU-level SIMD instructions. Replacing an explicit for loop with an array operation can result in 100x to 1000x speedups, making Python highly viable for high-throughput data pipelines. Part 2: Essential Modern Design Patterns 5. Dependency Injection for Testability

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from contextlib import contextmanager @contextmanager def database_transaction(session): try: yield session session.commit() except Exception: session.rollback() raise Use code with caution. Key Benefits Eradicates resource leaks and locked databases. Centralizes error recovery logic. Standardizes system setup and teardown routines. 8. Thread-Safe State Management via Context Variables