On Mon, 2021-03-15 at 11:13 +0100, Roland Puntaier via Python-ideas wrote:

I hesitate to call this proposal a language change. It is rather a syntactic allowance, like that of the trailing comma before the terminating token.

If implemented, such a proposal would in fact require a change to the language specification.

Can `x=[,1,2]` possibly be used for some future language feature, liking making `[,` a operator of its own? Considering that one has already decided that `,]` will not be allowed to have a separate meaning in the future, then, so should neither `[,`.

It would be helpful to me to understand what friction you're currently experiencing without such a change. I'm still struggling to appreciate what the benefit would be, beyond aesthetic preference.

Paul