Why does json.dumps sometimes fail to serialize my Python object? or How can I customize the output f

Thanks for all the tips! The `default=lambda o: o.__dict__` trick worked like a charm for debugging.

Still kinda wild that json.dumps doesn’t have a built-in "just try your best" mode, tho.

Quick Q: Anyone know why some objects serialize fine without __dict__? Like, why does it work sometimes and not others? Is there a hidden rule?