当我以某种方法创建对象时,不能在任何其他方法中使用它。因此,对象的使用仅限于该方法。但是我想以某种方式创建对象,可以在整个模块中使用它。
这是我要在其中创建对象的模块的代码,以便可以在每种方法中使用它。(应该做什么并不重要,但是对于那些在乎的人来说,它将是使用netlink套接字与内核进行通信的网络配置器)。
在方法configureBridge()
(从第4种方法开始)中,我尝试创建一个对象并使用它(ip = IPRoute()
... ip.release()
)并起作用了,但是ip
除之外,我无法在任何其他函数中使用对象变量configureBridge()
。有人可以帮我吗?
class PyrouteTwo(Configurator):
def __init__(self, inRollback=False):
super(PyrouteTwo, self).__init__(ConfigApplier(), inRollback)
self.runningConfig = RunningConfig()
logging.debug("testmark.PyR2.init")
def begin(self):
if self.configApplier is None:
self.configApplier = ConfigApplier()
if self.runningConfig is None:
self.runningConfig = RunningConfig()
logging.debug("testmark.PyR2.begin")
def commit(self):
self.configApplier = None
self.runningConfig.save()
self.runningConfig = None
logging.debug("testmark.PyR2.commit")
def configureBridge(self, bridge, **opts):
self.configApplier.addBridge(bridge)
if bridge.port:
bridge.port.configure(**opts)
self.configApplier.addBridgePort(bridge)
self.configApplier.setIfaceConfigAndUp(bridge)
logging.debug("testmark.PyR2.confBridge..")
# I am using the object here:
ip = IPRoute(fork=True)
dev = ip.link_lookup(ifname='em1')[0]
logging.debug("pyroute2 link_lookup output: %d", dev)
ip.release()
# there are some similar functions like configureVAN etc. in which I want
# to use the object
class ConfigApplier(object):
def _setIpConfig(self, iface):
ipConfig = iface.ipConfig
logging.debug("testmark.PyR2.ConfApplier.setIpConf.")
if ipConfig.ipaddr:
self.removeIpConfig(iface)
ipwrapper.addrAdd(iface.name, ipConfig.ipaddr,
ipConfig.netmask)
if ipConfig.gateway and ipConfig.defaultRoute:
ipwrapper.routeAdd(['default', 'via', ipConfig.gateway])
def removeIpConfig(self, iface):
ipwrapper.addrFlush(iface.name)
def setIfaceMtu(self, iface, mtu):
ipwrapper.linkSet(iface, ['mtu', str(mtu)])
def ifup(self, iface):
ipwrapper.linkSet(iface.name, ['up'])
if iface.ipConfig.bootproto == 'dhcp':
dhclient = DhcpClient(iface.name)
dhclient.start(iface.ipConfig.async)
def ifdown(self, iface):
ipwrapper.linkSet(iface.name, ['down'])
dhclient = DhcpClient(iface.name)
dhclient.shutdown()
def setIfaceConfigAndUp(self, iface):
if iface.ip:
self._setIpConfig(iface)
if iface.mtu:
self.setIfaceMtu(iface.name, iface.mtu)
self.ifup(iface)
def addBridge(self, bridge):
rc, _, err = execCmd([EXT_BRCTL, 'addbr', bridge.name])
if rc != 0:
raise ConfigNetworkError(ERR_FAILED_IFUP, err)
def addBridgePort(self, bridge):
rc, _, err = execCmd([EXT_BRCTL, 'addif', bridge.name,
bridge.port.name])
if rc != 0:
raise ConfigNetworkError(ERR_FAILED_IFUP, err)
def removeBridge(self, bridge):
rc, _, err = execCmd([EXT_BRCTL, 'delbr', bridge.name])
if rc != 0:
raise ConfigNetworkError(ERR_FAILED_IFDOWN, err)
logging.debug("testmarkPyR2.ConfApplier.remBridge")
# ...
def createLibvirtNetwork(self, network, bridged, iface, qosInbound=None,
qosOutbound=None):
netXml = libvirtCfg.createNetworkDef(network, bridged, iface,
qosInbound, qosOutbound)
libvirtCfg.createNetwork(netXml)
logging.debug("testmarkPyR2.ConfApplier.createLibvirtNetwork")
def removeLibvirtNetwork(self, network):
libvirtCfg.removeNetwork(network)
logging.debug("testmarkPyR2.ConfApplier.remLibvirtNetwork")
您可以通过以下方式将其声明为特定于对象的服装-
self.ip = value # Now its a object specific variable
或在为它赋值之前使其成为可验证的类。
class PyrouteTwo(Configurator):
ip = None # Now its a class variable
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