PEP 585 Builtin Generic Types (typing)

See also

• https://www.python.org/dev/peps/pep-0585/

• https://docs.python.org/3.9/whatsnew/3.9.html#pep-585-builtin-generic-types

Description

In type annotations you can now use built-in collection types such as list and dict as generic types instead of importing the corresponding capitalized types (e.g. List or Dict) from typing .

Some other types in the standard library are also now generic, for example queue.Queue.

Example:

def greet_all(names: list[str]) -> None:
    for name in names:
        print("Hello", name)