energy = None
class SimulatedEnergy(Writable):
    def getName(self):
        return "Energy"

    def write(self, value):
        global energy
        energy = value


class SimulatedEnergyReadback(Readable):
    def getName(self):
        return "Energy Readback"

    def read(self):
        global energy
        return energy;


sim_energy = SimulatedEnergy()
sim_energy_readback = SimulatedEnergyReadback()