[Python-ideas] The name Ellipsis should be a constant

May 31, 2021

      In Python `...` is referred to as `Ellipsis` and cannot be assigned to.
Yet, one can assign any value to the name `Ellipsis`.

Consider the following:

```
...
...
...
...
Ellipsis
... == Ellipsis
True
Ellipsis
Ellipsis
Ellipsis = 3
Ellipsis
3
... = 4
  File "<stdin>", line 1
    ... = 4
    ^
SyntaxError: cannot assign to Ellipsis
 # But I just did assign a new value to the name Ellipsis above.
Ellipsis
3
...
Ellipsis
... == Ellipsis
False

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.

André Roberge