Steven D'Aprano wrote:
Your example shows the proposed:
[*(language, text) for language, text in fulltext_tuples if language == 'english']
which can be written as:
[x for language, text in fulltext_tuples for x in (language, text) if language == 'english']
which is only ten characters longer. To me, though, there's simply no nice way of writing this: the repetition of "language, text" reads poorly regardless of whether there is a star or no star.
I think the ugliness of this particular example has roots in the fact that a tuple rather than an object with named fields is being used, which is going to make *any* piece of code that touches it a bit awkward.
If it were a namedtuple, for example, you could write
[*t for t in fulltext_tuples if t.language == 'english']
[x for t in fulltext_tuples if t.language == 'english' for x in t]
The latter is a bit unsatisfying, because we are having to make up an arbitrary name 'x' to stand for an element of t. Even though the two elements of t have quite different roles, we can't use names that reflect those roles.
Because of that, to my eyes the version with * makes it easier to see what is going on.