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아래의 코드에서 클래스에서 self.owner을 제거하는 방법을 찾으려고합니다 ... 아이디어는 주어진 VLAN에서 누가 IP 주소를 소유하고 있는지 알고 싶습니다. 또는 인터페이스를 명시 적으로 호출하지 않아도됩니다.효율적으로 파이썬 개체의 IP 주소 인스턴스 소유권을 조사합니다.
IPv4 주소의 소유자를 파생시키는 더 좋은 방법이 있습니까 (아마도 인트로 스펙 션을 통해)?
import ipaddr
class SomethingOwned(object):
def __init__(self, owner=None):
self._owner = owner
# Build self.owner (the object instance that owns the subclass object)
self._create_owner()
def _create_owner(self):
"""
create self.owner and ensure the subclass was called correctly
"""
if not (self._owner is None):
self.owner = self._owner
else:
raise ValueError, "%s() must be called with an 'owner' arg, which cannot be None" % self.__class__.__name__
class L3Address(SomethingOwned):
"""
A Layer3 IP PDU address that has an owning object
"""
def __init__(self, version=None, owner=None, addr=None, masklen=None):
# Call SomethingOwned.__init__(owner=owner) to add an owner attribute
super(L3Address, self).__init__(owner=owner)
self._addr = addr
self._masklen = masklen
self._version = version
# Build self._obj
self._create_ip_object()
self.addr = self._obj.ip
self.netmask = self._obj.netmask
self.masklen = self._obj.prefixlen
def __repr__(self):
return "<IPv%i %s/%s>" % (self._version, self.addr, self.masklen)
def _create_ip_object(self):
"""
create self._obj and ensure the subclass was called with the correct version
"""
if self._version==4:
if (self._masklen is None):
self._obj = ipaddr.IPv4Network(self._addr)
else:
self._obj = ipaddr.IPv4Network("%s/%s" % (self._addr, self._masklen))
elif version==6:
if (self._masklen is None):
self._obj = ipaddr.IPv6Network(self._addr)
else:
self._obj = ipaddr.IPv6Network("%s/%s" % (self._addr, self._masklen))
else:
raise ValueError, "Version must be 4 or 6"
class IPv4(L3Address):
def __init__(self, **kwargs):
## Initialize the IPv4 network object instance
# Call L3Protocol.__init__(version=4 **kwargs)
super(IPv4, self).__init__(version=4, **kwargs)
class IPv6(L3Address):
def __init__(self, **kwargs):
## Initialize the IPv6 network object instance
# Call L3Protocol.__init__(version=6 **kwargs)
super(IPv4, self).__init__(version=6, **kwargs)
class Vlan(object):
def __init__(self, name=None, id=None, ipv4=None):
self.id = id
self.name = name
if not (ipv4 is None):
### NOTE: I am trying to eliminate the need for the owner arg here
self.ipv4 = IPv4(owner=self, addr=ipv4)
def __repr__(self):
return "Vlan %s (name: %s)" % (self.id, self.name)
class Interface(object):
def __init__(self, id=None, ipv4=None):
self.id = id
self.ipv4 = None
if not (ipv4 is None):
### NOTE: I am trying to eliminate the need for the owner arg here
self.ipv4 = IPv4(owner=self, addr=ipv4)
def __repr__(self):
return "Interface %s" % self.id
if __name__=='__main__':
def find_owner(ip_instance):
print "Owner of '%s' is '%s'" % (ip_instance, ip_instance.owner)
find_owner(Interface(id='ge-0/0/0', ipv4='1.1.1.1').ipv4)
find_owner(Vlan(id='25', name='accounting', ipv4='1.1.1.2/25').ipv4)
실행은 결과 :이 단지 L3Protocol에서 owner 필드를 제거 할 수있는 방법입니다 그냥 마술 런타임에 그것을 결정
[[email protected] ~]$ python cisco.py
Owner of <IPv4 1.1.1.1/32> is 'Interface ge-0/0/0'
Owner of <IPv4 1.1.1.2/25> is 'Vlan 25 (name: accounting)'
[[email protected] ~]$