def __init__(self, prototype , elements):
        self.set_elements(elements)
        self.id = ""
        try:
            self.set_prototype(prototype)
        except TypeError:
            raise
Returns all unique items in the passed list.  If the a list-of-lists
dataset/ETHPy150Open victor-gil-sepulveda/pyProCT/pyproct/clustering/cluster.py/Cluster.__init__--crossover with--dataset/ETHPy150Open sunlightlabs/clearspending/completeness/statlib/pstat.py/unique