gistfile1.py

class Demo(HBox):
    extra_generated_classes = [["Demo", "Demo", "VBox"]]
    plot = Instance(Plot)
    AR_select = Instance(Select)
    @classmethod
    def create(cls):
        obj = cls()
        obj.plot = make_plot(you define this function)
        obj.AR_select = Select(name='ar_method', value='cube', options=['cube', 'best'])
        obj.children = [obj.AR_select, obj.plot]

    def setup_events(self):
        super(StockApp, self).setup_events()
        if self.AR_Select:
            self.AR_select.on_change('value', self, 'input_change')

    def input_change(self, obj, attrname, old, new):
        self.plot.ar_method = new

@bokeh_app.route("/bokeh/abstract_rendering/")
@object_page("abstract_rendering")
def plot():
    return Demo.create()