def _remove_dups(L):
    seen_before = set([])
    L2 = []
    for i in L:
        if i not in seen_before:
            seen_before.add(i)
            L2.append(i)
    return L2
Return True if the given object is a mapped class,
dataset/ETHPy150Open scipy/scipy/scipy/cluster/hierarchy.py/_remove_dups--crossover with--dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/orm/base.py/_is_mapped_class