def unique_names(self):
    names = set()
    for t in self.techniques:
      while names in t.name:
        t.name += '~'
      t.name = intern(t.name)
      names.add(t.name)
dataset/ETHPy150Open jansel/opentuner/opentuner/search/metatechniques.py/MetaSearchTechnique.unique_names/swapped operands of `in`