What's the best way to dumps json for efficient data handling? or How do you properly dumps json with

Dumping json is easy until it’s not lol.

Common pitfalls:
- Forgetting to handle None or custom classes
- Encoding issues (like non-UTF8 strings)
- Nested dicts with funky keys

Try `ensure_ascii=False` if your output looks escaped. And yeah, datetime is a big one—either convert it yourself or use a serializer.