def select_by_key(self, key):
        for item in self.children.values():
            if 'selected' in item.attributes:
                del item.attributes['selected']
        self.children[key].attributes['selected'] = 'selected'
        self.selected_key = key
        self.selected_item = self.children[key]
Interprets argv (sys.argv[1:]) in accordance with the doc for this
dataset/ETHPy150Open dddomodossola/remi/remi/gui.py/DropDown.select_by_key--crossover with--dataset/ETHPy150Open philipbergen/zero/py/zero/__init__.py/ZeroSetup.argv