Which answer is correct?

No — Python is dynamically typed for a reason. Type hints add clutter and slow down development.

— duck_typing_purist

Yes — use type hints on function signatures and class attributes. They catch bugs early via mypy/pyright, improve IDE autocomplete, and serve as documentation. Don't annotate every local variable.

— pragmatic_hints

Yes — annotate EVERYTHING. Every variable, every return, every parameter. Full coverage or nothing.

— max_coverage

Only for public APIs and libraries. Internal code doesn't need them.

— public_only