Support for "| None" would be great to have. +1.
https://github.com/python/peps/blob/master/pep-0604.rst On Fri, Mar 13, 2020, 9:36 AM Chris Angelico <ros...@gmail.com> wrote: > On Sat, Mar 14, 2020 at 12:24 AM Noah Peter May <m...@noahpmay.dev> wrote: > > > > Hello everyone, > > > > I'm not certain if this has been brought up before, but I felt like > bringing it to the table anyway. > > > > As the title says, it would be convenient to represent a union type with > the or operator. > > > > Yep! You're not the only one to want this. > > > The next is actually a question: do we use "bitwise or" or "boolean or" > (aka "|" vs "or")? I honestly don't know which would be preferable. The > latter is more readable than the other but requires 3-4 characters > (including whitespace) vs just 1-3 extra. Both are shorter than the 8-9 > chars for the traditional union. I'll just use both in the examples for now. > > > > The "or" operator is defined very thoroughly by the language and can't > be used for this, so the decision is made for you already - the "|" > operator is the only way to go. > > > In either case, we could override the or-dunder method to return the > "old" union representation of types > > > > List | Tuple == Union[List, Tuple] > > (Union[List, Tuple] or Union[int, str]) == Union[List, Tuple, int, str] > > > > This should allow any code relying on run-time annotations to work as > expected. > > Yep, agreed. > > Have a look at PEP 604, which is looking at this same idea. > > https://www.python.org/dev/peps/pep-0604/ > > I'm personally in favour :) > > ChrisA > _______________________________________________ > Python-ideas mailing list -- python-ideas@python.org > To unsubscribe send an email to python-ideas-le...@python.org > https://mail.python.org/mailman3/lists/python-ideas.python.org/ > Message archived at > https://mail.python.org/archives/list/python-ideas@python.org/message/WQ2TI5YV5RNTCOGBS4ZVPHZEARXDLLJI/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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