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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def on_select_mean_type_box(self, event):
 """ set parent Zeq_GUI to reflect change in this box and change the @param: event -> the wx.ComboBoxEvent that triggered this function """

        new_mean_type = self.mean_type_box.GetValue()
        if new_mean_type == "None":
            self.parent.clear_high_level_pars()
        self.parent.mean_type_box.SetStringSelection(new_mean_type)
        self.parent.onSelect_mean_type_box(event)