New in version 2.0.
Iterate elements in sequence n at a time wrapped to beginning:
abjad> from abjad.tools import sequencetools
abjad> list(sequencetools.iterate_sequence_nwise_wrapped(range(6), 3))
[(0, 1, 2), (1, 2, 3), (2, 3, 4), (3, 4, 5), (4, 5, 0), (5, 0, 1)]
Return generator.