@property
    def parents(self):                          # like Django's Context.pop()
        return self.__class__(*self.maps[1:])
Retain only the given fields.
dataset/ETHPy150Open ionelmc/python-aspectlib/src/aspectlib/py2chainmap.py/ChainMap.parents--crossover with--dataset/ETHPy150Open twitter/pycascading/python/pycascading/operators.py/retain