New in version 1.1.1.
Return True when the elements in iterable l are unique, otherwise False.
abjad> l = [1, 1, 1, 2, 3, 3, 4, 5] abjad> listtools.is_unique(l) False
Defined equal to l == type(l)(set(l)).
listtools.is_numeric
listtools.join_sublists_by_sign
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