How to use the vivisect.impemu function in vivisect

def __str__(self):
        return "InstructionRangeExceededError(ended at instruction 0x%08X)" % self.pc


class Hook(LoggingObject):
    def __init__(self):
        super(Hook, self).__init__()

    def hook(self, callname, emu, callconv, api, argv):
        # must return something other than None if handled
        # raise UnsupportedFunction to pass
        raise UnsupportedFunction()


class Monitor(vivisect.impemu.monitor.EmulationMonitor, LoggingObject):
    def __init__(self, vw):
        vivisect.impemu.monitor.EmulationMonitor.__init__(self)
        LoggingObject.__init__(self)
        self._vw = vw
        self._logger = logging.getLogger("Monitor")

    def getStackValue(self, emu, offset):
        return emu.readMemoryFormat(emu.getStackCounter() + offset, "

def __init__(self, vw):
        vivisect.impemu.monitor.EmulationMonitor.__init__(self)
        LoggingObject.__init__(self)
        self._vw = vw
        self._logger = logging.getLogger("Monitor")