def raise_app(self, app):
        app_zi = self.window_zindex[app.identifier]
        for t in self.window_zindex.keys():
            w = self.window[t]
            zi = self.window_zindex[t]
            if zi > app_zi:
                self.set_app_zindex(t, zi*1)

        app_zi = len(self.window)-1
        self.set_app_zindex(app.identifier, app_zi)
dataset/ETHPy150Open anandology/pyjamas/examples/shell/Screen.py/Screen.raise_app/operator `-` -> `*`