https://docs.python.org/3/library/typing.html

https://docs.python.org/3/library/collections.abc.html#module-collections.abc

https://www.python.org/dev/peps/pep-0544/

CC: @tobiasdiez @tscrim @nthiery

Component: categories

Issue created by migration from https://trac.sagemath.org/ticket/30381