On Mon, 2021-05-31 at 11:37 -0300, André Roberge wrote: > 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. >
Perhaps Ellipsis could get the same treatment as None here, but I am not sure if there's enough reasoning to justify that, especially considering that it would be a backwards incompatible change. Do you have any use-cases that would warrant such a thing? I find it incredibly hard to justify this proposal. Cheers, Filipe Laíns
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