New in version 2.0.
Partition sequence extended to counts without overhang:
abjad> from abjad.tools import sequencetools
abjad> sequencetools.partition_sequence_extended_to_counts_without_overhang([1, 2, 3, 4], [6, 6, 6])
[[1, 2, 3, 4, 1, 2], [3, 4, 1, 2, 3, 4], [1, 2, 3, 4, 1, 2]]
Return new object of sequence type.