I think making 'Ellipsis' a reserved word is too much. The analogy with non-reserved words like `int`, `str`, `map`, `print`, and so on, illustrate this, I think. I.e. redefining those is likely to cause bad things to happen, but we're consenting adults, and in the end they are just names.

However, I think improving the repr() of the Ellipsis object itself to remind users of the connection with its special literal `...` is a great idea.

On Mon, May 31, 2021 at 3:27 PM André Roberge <andre.roberge@gmail.com> wrote:

On Mon, May 31, 2021 at 4:17 PM Serhiy Storchaka <storchaka@gmail.com> wrote:
31.05.21 17:37, André Roberge пише:
> For consistency, `Ellipsis` (the name) should **always** refer to the
> same object that `...` refers to, so that both could not be assigned a
> new value.

Making Ellipsis a keyword will break ast.Ellipsis (and maybe some
third-party libraries).

I realized that after my initial post which is why I subsequently suggested that its repr should perhaps be "Ellipsis (...)". But, I admit, it is a rather obscure corner case that few, if any beginners would encounter and be confused by the error message.

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