Great point, Serhiy. I agree it would be very confusing to have types.Union and typing.Union.
types.UnionType, types.TypeUnionType, types.UnionTypeType all are much better IMHO. Cheers, Luciano On Sun, Jul 25, 2021 at 8:25 AM Serhiy Storchaka <storch...@gmail.com> wrote: > > In 3.10 the union type (the type of the result of the | operator for > types) was added (https://www.python.org/dev/peps/pep-0604/). It is > exposed as types.Union. There are differences between typing.Union and > types.Union: > > * typing.Union is indexable, types.Union is not. > * types.Union is a class, typing.Union is not. > > types.Union corresponds to private class typing._UnionGenericAlias, not > typing.Union. It is confusing that typing.Union and types.Union have the > same name but are so different. Note also that most classes in the types > module have the "Type" suffix: FunctionType, MethodType, ModuleType, > etc. I think that it would be better to rename types.Union to > types.UnionType. > > The name of types.Union is the part of already accepted PEP 604, so we > need to hear opinions of authors, sponsor and BDFL-delegate of the PEP. > > I did not participate in the discussion about PEP 604 so I do not know > if there are arguments in favor of types.Union over types.UnionType. > > _______________________________________________ > Python-Dev mailing list -- python-dev@python.org > To unsubscribe send an email to python-dev-le...@python.org > https://mail.python.org/mailman3/lists/python-dev.python.org/ > Message archived at > https://mail.python.org/archives/list/python-dev@python.org/message/RHRF7Q25GQ3EIEUJHW72YLQNMCUDLWRW/ > Code of Conduct: http://python.org/psf/codeofconduct/ -- Luciano Ramalho | Author of Fluent Python (O'Reilly, 2015) | http://shop.oreilly.com/product/0636920032519.do | Technical Principal at ThoughtWorks | Twitter: @ramalhoorg _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/ZFQMCT2HEK2525BOBCJUFO73NGBZQCR7/ Code of Conduct: http://python.org/psf/codeofconduct/
