import os
import sys
import re
import string
f=open('./iprange','r')
s=f.readline()
f.close()
pattern='inet addr:'+s
pattern=pattern.split('x')[0]
pattern='('+pattern+'...'+')'
os.system('ifconfig -a >> interfaces')
f=open('./interfaces','r')
s=f.readline()
while (len(s))!=0:
i=re.search(pattern,s)
if i!=None:
sp=re.split(pattern,s)[1]
ip=re.split('inet addr:',sp)[1]
break
s=f.readline()
f.close()
os.system('rm ./interfaces')
f=open('./userip','w')
f.write(ip)
f.close()
NameError;name 'ip' is not defined
我将pattern
拆分为s
并将结果存储在sp
中,然后找到IP地址并将结果存储在ip
中。但错误说ip
未定义 - 发生了什么?
答案 0 :(得分:3)
while (len(s))!=0:
i=re.search(pattern,s)
if i!=None:
sp=re.split(pattern,s)[1]
ip=re.split('inet addr:',sp)[1]
break
s=f.readline()
ip赋值在if闭包内,显然从未执行过。
答案 1 :(得分:1)
我会做更多这样的事情:
import os
import sys
import re
from itertools import takewhile
with open('./iprange','r') as f:
s = f.readline()
prefix = 'inet addr:'
pattern = prefix + s
pattern = pattern.split('x')[0]
pattern = '(%s...)' % pattern
os.system('ifconfig -a >> interfaces')
with open('interfaces', 'r') as f:
# Put all lines up to the first empty line into a list
# http://docs.python.org/2/library/itertools.html#itertools.takewhile
# `[line.rstrip() for line in f]` could be a generator instead:
# (line.rstrip() for line in f)
lines = list(takewhile(lambda x: x, [line.rstrip() for line in f]))
os.remove('interfaces')
for s in lines:
if re.search(pattern, s):
sp = re.split(pattern, s)[1]
ip = sp[len(prefix):]
with open('./userip', 'w') as f:
f.write(ip)
break
else:
print "No match found"
首先,如果找到匹配项,您只会写入文件userip
,如果找不到匹配项,则会收到消息。