[Python] 寻觅A文件中有而B文件中没有的记录

[Python] 找寻A文件中有而B文件中没有的记录

举个简单例子。比如a.log文件中有地址记录

...

0x68CF94B0

0x68CF94B4

0x68CE94D8

0x68CF7460
...

 

b.log中有地址记录

...

0x68CE94D8

0x68CF94B0

...

 

运行脚本：

#!/usr/bin/python

import re

a_file = open("a.log", 'r')
b_file = open("b.log", 'r')

addr_set = set()

for line in b_file.readlines():
#    print line
    result = re.search(r"(0x[\dA-F]+)", line)
    if (result != None):
        addr = result.group(1)
        addr_set.add(addr)
#        print addr

for line in a_file.readlines():
    result = re.search(r"(0x[\dA-F]+)", line)
    if (result != None):
        addr = result.group(1)
        if (addr not in addr_set):
            print "Found:%s" % line

a_file.close()
b_file.close()

得到a.log中有而b.log中没有的地址记录：

Found:0x68CF94B4

Found:0x68CF7460