Himpunan unik di Python

m.py

class M(object):
    def __init__(self, posisi, asam_amino):
        self.posisi = posisi
        self.asam_amino = asam_amino

    def __repr__(self):
        return "%s%s" % (self.posisi, self.asam_amino)


    def __eq__(self, o):
        if not isinstance(o, M):
            return False
        return self.posisi == o.posisi \
               and self.asam_amino == o.asam_amino

    def __hash__(self):
        return hash((self.posisi, self.asam_amino))

mutasi = [ M(1, "a"), M(2, "b"), M(1, "c"), M(3, "b"), M(1, "a") ]

print mutasi

print set(mutasi)