Steven D'Aprano added the comment: > list expression pass starred expression, the other hand > tuple expression cannot pass starred expression.
You are misinterpreting what you are seeing. ( ) is not a tuple expression (except for the special case of empty brackets, which makes an empty tuple). It's just grouping an expression. So (*x) is equivalent to just bare *x. To make a tuple, you need a comma. Apart from the empty tuple, the brackets are just for grouping. Put a comma after the starred expression and it will work: py> t = 1, 2 py> t (1, 2) py> (*t,) (1, 2) The trailing comma is allowed in lists as well: py> [*t,] [1, 2] I agree with Martin: there's no bug here, the behaviour is consistent with the way tuples and lists are normally created, and there's no need to make (*t) yet another special case. If you really want to argue in favour of this change, I suggest you discuss it on the Python-Ideas mailing list and see if you can get community consensus for it. *If* you get agreement that this is a good idea, then you can re-open this. ---------- nosy: +steven.daprano resolution: -> not a bug stage: -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30084> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
