returns

The Maybe container replaces None with Some and Nothing types, preventing null-related errors entirely, as shown in the README's refactored example that avoids nested if checks for None values.

Integrates seamlessly with mypy and PEP561 for rigorous type checking, including emulated Higher Kinded Types, ensuring compile-time safety for complex functional patterns.

The RequiresContext container enables typed, explicit dependency injection without cluttering function signatures, demonstrated in the Django example for configurable game logic.

IO and IOResult containers clearly mark impure operations (like I/O), enforcing better architecture and testability, as illustrated in the refactored HTTP request example.