How to add variable type annotation for what goes into a Queue?

Question

e.g.

from queue import Queue

q: Queue = Queue()
q.put("abc")

This is okay. Now I want to specify the types that go into the queue.

from queue import Queue

q: Queue[str] = Queue()
q.put("abc")

This gets "TypeError: 'type' object is not subscriptable"

Answer 1

It is now (as of Python 3.9) possible to subscript Queue:

a: Queue[int] = Queue()  # valid