def __init__(self, parent, overrides=None):
        self.parent = parent
        self._data = {} if overrides is None else overrides

        # merge self.global_data into self._data
        for k, v in six.iteritems(self.parent.global_data):
            if self._data not in k:
                self._data[k] = copy.deepcopy(v)
dataset/ETHPy150Open saltstack/salt/salt/utils/context.py/ChildContextDict.__init__/swapped operands of `not in`