文字內容如下：
192.168.100.125  UNKNOWN  w0100441  [03/Jun/2015:16:16:26 +0800] 226 119096 0.014
..........................
63.54.78.89         UNKNOWN  w0500465  [03/Sep/2015:16:16:26 +0800] 275 119098 0.019
..........................
61.30.89.6           UNKNOWN  kobe          [15/Oct/2015:09:15:35 +0800] 426 1109168 3.215
..........................
192.168.100.126  UNKNOWN  dingjunhui  [15/Mar/2016:09:15:35 +0800] 426 1109168 3.215
..........................
220.86.123.140    UNKNOWN  idenbo       [03/May/2016:09:41:27 +0800] 226 7068129 12.102

上面的檔案是一個OS的登入日誌，第一列是登入到伺服器的客戶端的IP地址，第三列是帳號，以w開頭的是公司內網帳號，
其餘的均為外網帳號。192.168.100的為內網IP，其餘的均為外網IP，我現在想要找出三個月內，
以內網帳號和外網IP登入伺服器的行（例如 63.54.78.89     UNKNOWN  w0500465），
和以外網帳號和內網IP登入伺服器的行（例如： 192.168.100.126  UNKNOWN  dingjunhui），
用Python如何來實現？如果這裡查詢的時間是個變數，即找出四個月內，五個月內的資訊（依次類推），用Python語言如何來寫？
 

#!/usr/bin/env python
# -*- coding: utf-8 -*- 

import sys
import getopt
from datetime import datetime
import time
from dateutil.relativedelta import relativedelta
import re

__author__ = 'shengwei ma'
__author_email__ = '[email protected]'

input_file = ""
output_file = ""
a = ""

try:
    opts,
 
 args = getopt.getopt(sys.argv[1:], "hm:", ["input=", "output="])
except getopt.GetoptError as err:
    print(str(err))
for op, value in opts:
    if op == "--input":
        input_file = value
    elif op == "-m":
        a = int(value)
    elif op == "--output":
        output_file = open(value, 'w'
 
)
    elif op == "-h":
        print("python filter_by_month.py --input your_input_file -m 3 --output your_out_file")
        sys.exit()

months = datetime.now() + relativedelta(months=-a)
month = months.strftime("%d/%b/%Y %H:%M:%S")
print 'You will find after this time %s line!' % month

with open(input_file, 'r') as f:
    for num, line in enumerate(f):
        if num % 2 == 0:
            new_line = line.strip().split()
            date = new_line[3].lstrip('[').split(':')
            new_date = date[0] + ' ' + date[1] + ':' + date[2] + ':' + date[3]
            timeArray_b = time.strptime(new_date, "%d/%b/%Y %H:%M:%S")
            timeArray_a = time.strptime(month, "%d/%b/%Y %H:%M:%S")
            if timeArray_b > timeArray_a:
                if new_line[0].startswith('192') and re.findall(r'[^w]', new_line[2]):
                    output_file.write(line)
                elif new_line[2].startswith('w') and re.findall(r'[^192]', new_line[0]):
                    output_file.write(line)