triplets.py

def triplets( alist ):

    alist.sort()
    p     = getPartitionInt( alist )
    trips = set()

    if p == -1:
        return "No Triplets"

    glz = alist[:p]
    gez = alist[p:]

    for l in glz:
        for e in gez:
            if -(l+e) < 0:
                x = binarySearch(glz, -(l+e))
            else:
                x = binarySearch(gez, -(l+e))

            if x:
                t = [l,e,-(l+e)]
                t.sort()
                trips.add(tuple(t))

    return trips