Why not a, b += i, j? (augmented assignment via tuple unpacking)

[Joshua Marshall]

John Roth <johnroth at ameritech.net> wrote:

> I'd think it would be equivalent to:

> a += i
> b += j

> the corner case you mention should behave
> the same as

> a, b = b, a

> Why make it more complicated than it has
> to be?

Because if you do the translation with your rule, you get:

  a += b
  b += a

which is, in my opinion, unexpected.