def alt_keys(self):
        keylist = self.keys()
        for one in [x for x in ['FN', 'N', 'VERSION'] if keylist in x]:
            keylist.remove(one)
        keylist.sort()
        return keylist
dataset/ETHPy150Open geier/pycarddav/pycarddav/model.py/VCard.alt_keys/swapped operands of `in`