New in version 1.1.
Group sequence elements by equality:
abjad> from abjad.tools import sequencetools
abjad> sequencetools.partition_sequence_by_value_of_elements([0, 0, -1, -1, 2, 3, -5, 1, 1, 5, -5])
[(0, 0), (-1, -1), (2,), (3,), (-5,), (1, 1), (5,), (-5,)]
Return list of tuples of sequence element references.
Changed in version 2.0: renamed sequencetools.group_by_equality() to sequencetools.partition_sequence_by_value_of_elements().