Type annotation improvements ¶

https://treyhunner.com/2021/10/whats-great-about-python-3-dot-10/

If you use type annotations, type unions are even easier now using the | operator (in addition to typing.Union).

Other big additions in type annotation land include parameter specification variables, type aliases, and user-defined type guards.

I still don’t use type annotations often, but these features are a pretty big deal for Python devs who do .

Also if you’re introspecting annotations, calling the inspect.get_annotations function is recommended over accessing __annotations__ directly or calling the typing.get_type_hints function.