def __del__(self):
        try:
           for cb,opaque in self.domainEventCallbacks.items():
               del self.domainEventCallbacks[cb]
           del self.domainEventCallbacks
           libvirtmod.virConnectDomainEventDeregister(self._o, self)
        except AttributeError:
           pass

        if self._o != None:
            libvirtmod.virConnectClose(self._o)
        self._o = None

    def domainEventDeregister(self, cb):
        """Removes a Domain Event Callback. De-registering for a
           domain callback will disable delivery of this event type """
        try:
            del self.domainEventCallbacks[cb]
            if len(self.domainEventCallbacks) == 0:
                del self.domainEventCallbacks
                ret = libvirtmod.virConnectDomainEventDeregister(self._o, self)
                if ret == -1: raise libvirtError ('virConnectDomainEventDeregister() failed', conn=self)
        except AttributeError:
            pass

    def domainEventRegister(self, cb, opaque):
        """Adds a Domain Event Callback. Registering for a domain
           callback will enable delivery of the events """
        try:
            self.domainEventCallbacks[cb] = opaque
        except AttributeError:
            self.domainEventCallbacks = {cb:opaque}
            ret = libvirtmod.virConnectDomainEventRegister(self._o, self)
            if ret == -1: raise libvirtError ('virConnectDomainEventRegister() failed', conn=self)

    def _dispatchDomainEventCallbacks(self, dom, event, detail):
        """Dispatches events to python user domain event callbacks
        """
        try:
            for cb,opaque in self.domainEventCallbacks.items():
                cb(self,dom,event,detail,opaque)
            return 0
        except AttributeError:
            pass

    def _dispatchDomainEventLifecycleCallback(self, dom, event, detail, cbData):
        """Dispatches events to python user domain lifecycle event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), event, detail, opaque)
        return 0

    def _dispatchDomainEventGenericCallback(self, dom, cbData):
        """Dispatches events to python user domain generic event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), opaque)
        return 0

    def _dispatchDomainEventRTCChangeCallback(self, dom, offset, cbData):
        """Dispatches events to python user domain RTC change event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), offset ,opaque)
        return 0

    def _dispatchDomainEventWatchdogCallback(self, dom, action, cbData):
        """Dispatches events to python user domain watchdog event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), action, opaque)
        return 0

    def _dispatchDomainEventIOErrorCallback(self, dom, srcPath, devAlias,
                                            action, cbData):
        """Dispatches events to python user domain IO error event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), srcPath, devAlias, action, opaque)
        return 0

    def _dispatchDomainEventIOErrorReasonCallback(self, dom, srcPath,
                                                  devAlias, action, reason,
                                                  cbData):
        """Dispatches events to python user domain IO error event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), srcPath, devAlias, action,
           reason, opaque)
        return 0

    def _dispatchDomainEventGraphicsCallback(self, dom, phase, localAddr,
                                            remoteAddr, authScheme, subject,
                                            cbData):
        """Dispatches events to python user domain graphics event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), phase, localAddr, remoteAddr,
           authScheme, subject, opaque)
        return 0

    def dispatchDomainEventBlockPullCallback(self, dom, path, type, status, cbData):
        """Dispatches events to python user domain blockJob event callbacks
        """
        try:
            cb = cbData["cb"]
            opaque = cbData["opaque"]

            cb(self, virDomain(self, _obj=dom), path, type, status, opaque)
            return 0
        except AttributeError:
            pass

    def _dispatchDomainEventDiskChangeCallback(self, dom, oldSrcPath, newSrcPath, devAlias, reason, cbData):
        """Dispatches event to python user domain diskChange event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), oldSrcPath, newSrcPath, devAlias, reason, opaque)
        return 0

    def _dispatchDomainEventTrayChangeCallback(self, dom, devAlias, reason, cbData):
        """Dispatches event to python user domain trayChange event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), devAlias, reason, opaque)
        return 0

    def _dispatchDomainEventPMWakeupCallback(self, dom, reason, cbData):
        """Dispatches event to python user domain pmwakeup event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), reason, opaque)
        return 0

    def _dispatchDomainEventPMSuspendCallback(self, dom, reason, cbData):
        """Dispatches event to python user domain pmsuspend event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), reason, opaque)
        return 0

    def _dispatchDomainEventBalloonChangeCallback(self, dom, actual, cbData):
        """Dispatches events to python user domain balloon change event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), actual, opaque)
        return 0

    def _dispatchDomainEventPMSuspendDiskCallback(self, dom, reason, cbData):
        """Dispatches event to python user domain pmsuspend-disk event callbacks
        """
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, virDomain(self, _obj=dom), reason, opaque)
        return 0

    def domainEventDeregisterAny(self, callbackID):
        """Removes a Domain Event Callback. De-registering for a
           domain callback will disable delivery of this event type """
        try:
            ret = libvirtmod.virConnectDomainEventDeregisterAny(self._o, callbackID)
            if ret == -1: raise libvirtError ('virConnectDomainEventDeregisterAny() failed', conn=self)
            del self.domainEventCallbackID[callbackID]
        except AttributeError:
            pass

    def domainEventRegisterAny(self, dom, eventID, cb, opaque):
        """Adds a Domain Event Callback. Registering for a domain
           callback will enable delivery of the events """
        if not hasattr(self, 'domainEventCallbackID'):
            self.domainEventCallbackID = {}
        cbData = { "cb": cb, "conn": self, "opaque": opaque }
        if dom is None:
            ret = libvirtmod.virConnectDomainEventRegisterAny(self._o, None, eventID, cbData)
        else:
            ret = libvirtmod.virConnectDomainEventRegisterAny(self._o, dom._o, eventID, cbData)
        if ret == -1:
            raise libvirtError ('virConnectDomainEventRegisterAny() failed', conn=self)
        self.domainEventCallbackID[ret] = opaque
        return ret

    def listAllDomains(self, flags=0):
        """List all domains and returns a list of domain objects"""
        ret = libvirtmod.virConnectListAllDomains(self._o, flags)
        if ret is None:
            raise libvirtError("virConnectListAllDomains() failed", conn=self)

        retlist = list()
        for domptr in ret:
            retlist.append(virDomain(self, _obj=domptr))

        return retlist

    def listAllStoragePools(self, flags=0):
        """Returns a list of storage pool objects"""
        ret = libvirtmod.virConnectListAllStoragePools(self._o, flags)
        if ret is None:
            raise libvirtError("virConnectListAllStoragePools() failed", conn=self)

        retlist = list()
        for poolptr in ret:
            retlist.append(virStoragePool(self, _obj=poolptr))

        return retlist

    def listAllNetworks(self, flags=0):
        """Returns a list of network objects"""
        ret = libvirtmod.virConnectListAllNetworks(self._o, flags)
        if ret is None:
            raise libvirtError("virConnectListAllNetworks() failed", conn=self)

        retlist = list()
        for netptr in ret:
            retlist.append(virNetwork(self, _obj=netptr))

        return retlist

    def listAllInterfaces(self, flags=0):
        """Returns a list of interface objects"""
        ret = libvirtmod.virConnectListAllInterfaces(self._o, flags)
        if ret is None:
            raise libvirtError("virConnectListAllInterfaces() failed", conn=self)

        retlist = list()
        for ifaceptr in ret:
            retlist.append(virInterface(self, _obj=ifaceptr))

        return retlist

    def listAllDevices(self, flags=0):
        """Returns a list of host node device objects"""
        ret = libvirtmod.virConnectListAllNodeDevices(self._o, flags)
        if ret is None:
            raise libvirtError("virConnectListAllNodeDevices() failed", conn=self)

        retlist = list()
        for devptr in ret:
            retlist.append(virNodeDevice(self, _obj=devptr))

        return retlist

    def listAllNWFilters(self, flags=0):
        """Returns a list of network filter objects"""
        ret = libvirtmod.virConnectListAllNWFilters(self._o, flags)
        if ret is None:
            raise libvirtError("virConnectListAllNWFilters() failed", conn=self)

        retlist = list()
        for filter_ptr in ret:
            retlist.append(virNWFilter(self, _obj=filter_ptr))

        return retlist

    def listAllSecrets(self, flags=0):
        """Returns a list of secret objects"""
        ret = libvirtmod.virConnectListAllSecrets(self._o, flags)
        if ret is None:
            raise libvirtError("virConnectListAllSecrets() failed", conn=self)

        retlist = list()
        for secret_ptr in ret:
            retlist.append(virSecret(self, _obj=secret_ptr))

        return retlist

    def _dispatchCloseCallback(self, reason, cbData):
        """Dispatches events to python user close callback"""
        cb = cbData["cb"]
        opaque = cbData["opaque"]

        cb(self, reason, opaque)
        return 0


    def unregisterCloseCallback(self):
        """Removes a close event callback"""
        ret = libvirtmod.virConnectUnregisterCloseCallback(self._o)
        if ret == -1: raise libvirtError ('virConnectUnregisterCloseCallback() failed', conn=self)

    def registerCloseCallback(self, cb, opaque):
        """Adds a close event callback, providing a notification
         when a connection fails / closes"""
        cbData = { "cb": cb, "conn": self, "opaque": opaque }
        ret = libvirtmod.virConnectRegisterCloseCallback(self._o, cbData)
        if ret == -1:
            raise libvirtError ('virConnectRegisterCloseCallback() failed', conn=self)
        return ret