YOU’RE LEARNING TO↗serialize complex Python objects to JSON using custom JSONEncoder subclasses and the default= hook
↗deserialize JSON back into rich Python types using object_hook
↗round-trip dataclasses to and from JSON via dataclasses.asdict and a custom from-dict factory
↗safely serialize datetime and Decimal values to and from JSON
↗write and read JSON Lines (NDJSON) files for streaming large datasets
↗Learner understands sort_keys, indent, separators, and their performance implications