How to use the union operator instead of Union for typing

union_operator_for_typing.py

from typing import Union


def is_valid_type(object):
    return isinstance(object, Union[str, None])


def is_valid_type_new(object):
    return isinstance(object, str | None)


if __name__ == "__main__":
    for entry in ["foo", None, 10]:
        old_style = is_valid_type(entry)
        new_style = is_valid_type_new(entry)
        print(f"For '{entry}' we get old_style={old_style} and new_style={new_style}")

    """
    For 'foo' we get old_style=True and new_style=True
    For 'None' we get old_style=True and new_style=True
    For '10' we get old_style=False and new_style=False
    """

dependencies: python3.10