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from contextlib import contextmanager @contextmanager def managed_resource(*args, **kwds): # Setup phase resource = acquire_resource(*args, **kwds) try: yield resource finally: # Teardown phase resource.release() Use code with caution. Structural Creational Patterns: Advanced Factories

Ideal for web scrapers, chat servers, and API gateways. 🏗️ Part 2: Essential Structural Patterns 1. Protocol-Based Pythonic Interfaces

Annotations are critical for document review and collaboration. pypdf provides an intuitive API for adding and reading annotations. You can easily add text, links, rectangles, and even free-text annotations directly to pages. The pypdf.annotations module offers a clean, object-oriented approach to managing these elements.

The library's evolution has introduced a host of robust features that address the complex needs of data engineers and developers.