Matsuoka Takuo writes:
*(1,2), (1, 2)
Yes, this works, and now that I see you just want that to work in "a[*(1,2),]", I agree, I don't know why that is a syntax error. This works, of course: t = *(1,2), a[t] (in the sense that if a is a sequence you get a TypeError because the index isn't an integer or slice, but if it's a mapping you'll get the value corresponding to (1,2) or a KeyError because it's not in the mapping). I think it's not good that "a[*(1,2),]" gives a SyntaxError, but I don't know why it was made that way in the first place.
I find it unfortunate SyntaxError you got with
*(1,2)
says "can't use starred expression here" since "*(1,2)" is not really a "starred expression" as defined in the Language Reference.
I don't have time to go into that tonight but if the appropriate thread gets takeup I'll comment there. You could promote the issue by submitting a merge request. Steve