def __isub__(self,other):
        for k in list(other.keys()):
            if k in self:
                del self[k]
        return self
Called when the user changes the search mode via the OptionMenu.
dataset/ETHPy150Open ipython/ipython-py3k/IPython/utils/ipstruct.py/Struct.__isub__--crossover with--dataset/ETHPy150Open cpbotha/nvpy/nvpy/view.py/View.handler_search_mode