Samuel Colvin predicts Python will eventually need a new union type that operates like a Rust enum, allowing runtime tracking of which member of the union an instance represents.

Pydantic V2 introduces the ability to customize serialization on a per-field basis, rather than only on a per-type basis.

The Hypothesis testing library is expected to soon add support for `typing.Annotated`, enabling it to generate test data that respects metadata constraints.