Serpent 2.0 introduced a new storage data structure
that is not valid Python. I know that Serpent IS not Python, but for experienced Python developers this (from the wiki) is rather awkward:
data bodies(head(eyes, nose, mouth), arms(fingers, elbow), legs)
An alternative that would read as valid Python could be:
bodies = 100 * [head[2 * [eye], nose, mouth], 2 * [arm], 2 * [leg]]
Or use '(' if you want tuples (but that looks too much like an invocation to me).