On Thu, Aug 27, 2020, 1:15 PM Christopher Barker

I agree -- this is very much a feature for third party packages -- or *maybe* some future stdlib class, but the builtins are fine as they are.

In fact, I don't think there's a single use of a tuple of indexes (meaning something other than an arbitrary single object) in the stdlib is there? I know I've only used that in numpy.

I don't know whether it is in the stdlib, but I sometimes use tuples as dict keys. E.g.

mydict[('mertz', 'david')] = 3.1415

Even though I could omit them, I'd almost surely use the parens for that. And more likely it would be:

name = ('mertz', 'david')

mydict[name] = 3.1415

Conceptually, an "immutable collection" serves a different purpose than "a collection of axes", even if they work then same under the hood.