[3.10] bpo-44490: Add parameters and getitem to types.Union (GH-26980) (GH-27207)

Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
Co-authored-by: Guido van Rossum <gvanrossum@gmail.com>.
(cherry picked from commit c45fa1a5d9b419cf13ad4b5a7cb453956495b83e)

Co-authored-by: Yurii Karabas <1998uriyyo@gmail.com>
Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>

Serhiy Storchaka committed 4y ago

2d055ce13250a4074f66a945381a149a3cf8c46f

Parent: e22e864

Committed by GitHub <noreply@github.com> on 7/17/2021, 7:14:57 PM

[3.10] bpo-44490: Add __parameters__ and __getitem__ to types.Union (GH-26980) (GH-27207)

[3.10] bpo-44490: Add parameters and getitem to types.Union (GH-26980) (GH-27207)