單獨提取IPV6地址的正則表達式

Question

我試圖從下面的行提取IPV6地址。我得到了下面的輸出。我只是想，直到IPV6地址，而不是超越that.That是我不希望看到的內容：鏈接

代碼：

out ='ifconfig eth6.36\r\neth6.36 Link encap:Ethernet HWaddr A0:36:9F:5F:24:EE \r\n   inet addr:36.36.36.10 Bcast:36.36.36.255 Mask:255.255.255.0\r\n   inet6 addr: fe80::a236:9fff:fe5f:24ed/64 Scope:Link\r\n   inet6 addr: 2030:30:30:30::10/64 Scope:Link\r\n UP BROADCAST MULTICAST MTU:9000 Metric:1\r\n   RX packets:0 errors:0 dropped:0 overruns:0 frame:0\r\n   TX packets:62 errors:0 dropped:0 overruns:0 carrier:0\r\n   collisions:0 txqueuelen:0 \r\n   RX bytes:0 (0.0 b) TX bytes:7004 (6.8 KiB)\r\n\r\n' 
pattern = '(eth6\.36\s+Link encap:Ethernet\s*HWaddr\s*\w\w:\w\w:.+\s*inet addr:36.36.36.10\s*Bcast:36.36.36.255\s*Mask:255.255.255.0\s*\inet6 addr:\s*\w\w\w\w:.+)' 

match = re.search(pattern, out) 
print match.groups() 

輸出：

('eth6.36 Link encap:Ethernet HWaddr A0:36:9F:5F:24:EE \r\n   inet addr:36.36.36.10 Bcast:36.36.36.255 Mask:255.255.255.0\r\n   inet6 addr: fe80::a236:9fff:fe5f:24ed/64 Scope:Link\r',) 

Answer 1

您可以根據需要移動圓括號。 像

pattern = '(eth6\.36\s+Link encap:Ethernet\s*HWaddr\s*\w\w:\w\w:.+\s*inet addr:36.36.36.10\s*Bcast:36.36.36.255\s*Mask:255.255.255.0\s*\inet6 addr:\s*\w\w\w\w:.+) Scope:Link' 

會得到

In [9]: match.groups()[0] 
Out[9]: 'eth6.36 Link encap:Ethernet HWaddr A0:36:9F:5F:24:EE \r\n   inet addr:36.36.36.10 Bcast:36.36.36.255 Mask:255.255.255.0\r\n   inet6 addr: fe80::a236:9fff:fe5f:24ed/64' 

和

pattern = 'eth6\.36\s+Link encap:Ethernet\s*HWaddr\s*\w\w:\w\w:.+\s*inet addr:36.36.36.10\s*Bcast:36.36.36.255\s*Mask:255.255.255.0\s*\inet6 addr:\s*(\w\w\w\w:.+) Scope:Link' 

會得到

In [16]: match.groups()[0] 
Out[16]: 'fe80::a236:9fff:fe5f:24ed/64' 

Answer 2

既然你處理的ifconfig的（標準）輸出，爲什麼不完全用正則表達式來解決，而只是操縱字符串？

$ cat /tmp/tmp.py 
#!/usr/bin/env python3 

out ='ifconfig eth6.36\r\neth6.36 Link encap:Ethernet HWaddr A0:36:9F:5F:24:EE \r\n   inet addr:36.36.36.10 Bcast:36.36.36.255 Mask:255.255.255.0\r\n   inet6 addr: fe80::a236:9fff:fe5f:24ed/64 Scope:Link\r\n   inet6 addr: 2030:30:30:30::10/64 Scope:Link\r\n UP BROADCAST MULTICAST MTU:9000 Metric:1\r\n   RX packets:0 errors:0 dropped:0 overruns:0 frame:0\r\n   TX packets:62 errors:0 dropped:0 overruns:0 carrier:0\r\n   collisions:0 txqueuelen:0 \r\n   RX bytes:0 (0.0 b) TX bytes:7004 (6.8 KiB)\r\n\r\n' 

ip6 = out.split()[6] 
print(ip6) 

它給你：

$ python /tmp/tmp.py 
A0:36:9F:5F:24:EE 

你基本上捕捉整行