def __getitem__(self, key):
        if key not in self:
            self.__missing__(key)
        return super(PlotlyDict, self).__getitem__(key)
Calls __missing__ when key is not found. May mutate object.
dataset/ETHPy150Open plotly/plotly.py/plotly/graph_objs/graph_objs.py/PlotlyDict.__getitem__