[SuchAnonMuchWow]

It doesn't start from 0: there was some pattern matching before:

(a, b, c, d) = range(4)

[ksm1717]

Now we can do

(a, b, c, d, e, f, g, h) = range(8)

[bmn__]

This is destructuring.

[seertaak]

...which is a simple form of pattern matching.