pythonログを日単位で分割

ログ形式:
1.1.1.1 - - [30/Apr/2015:00:34:55 +0800] “POST/iDataService/services/MemRoomService HTTP/1.0” 200 405 “-” “Axis/1.4” “-” 1.1.1.1 - - [30/Apr/2015:00:34:55 +0800] “POST/iDataService/services/CutLoginService HTTP/1.1” 200 438 “-” “Apache CXF 2.7.8” “-” 1.1.1.1 - - [20/Apr/2015:00:34:55 +0800] “POST/iDataService/services/NoticeListService HTTP/1.1” 200 656 “-” “Apache CXF 2.7.8” “-” 1.1.1.1 - - [30/Apr/2016:00:34:56 +0800] “POST/iDataService/services/MemSelfQueryService HTTP/1.0” 200 1344 “-” “Axis/1.4” “-“
分割要件:
日を日別に分割する、ファイル名はaccessなどである.log-20160101

 #!/usr/bin/env python
 # -- conding:utf-8 -- 
 #
import os
import time

path1='/lianxi/python/split/lianxi1'
file=open(path1,'r')

for line in file:
        str=line.split()[3]
        otime=str[1:12]

        time_jieshu = time.strptime(otime, '%d/%b/%Y')
        time_jieshu = int(time.mktime(time_jieshu))
        ntime=time.strftime('%Y%m%d',time.localtime(time_jieshu))
 #      print  ntime

        log_file='/lianxi/python/split/access.log-%s' %ntime

        with open(log_file,'a') as f:
                if not os.path.exists(log_file):
                        os.mknod(log_file)
 #                      f.write(line)
 #              else:
                f.write(line)
                f.close()

#!/usr/bin/python
#coding=utf-8
#author lyk
import re,os,commands
a=open('/python/access.log','r')
exc_month={'Apr':'04','Aug':'08','Dec':'12','Feb':'02','Jan':'01','Jul':'07','Jun':'06','Mar':'03','May':'05','Nov':'11','Oct':'10','Sep':'09'}
def touch_file():
        blist=[]
        commands.getoutput('rm -rf /accesslog/*')
        for i in a:
                blist.append(re.findall(r"\[(.+?):",i)[0])
        new_blist=[]
        for j in blist:
                        if j.replace('/','.') not in new_blist:
                                new_blist.append(j.replace('/','.'))
        for j in new_blist:
                commands.getoutput('touch /accesslog/access.log-%s'%(j[7:17]+exc_month[j[3:6]]+j[0:2]))
def append_file():
        for i in a:
                mfile=re.findall(r"\[(.+?):",i)[0].replace('/','')
                f=open("/accesslog/access.log-"+mfile[5:9]+exc_month[mfile[2:5]]+mfile[0:2],'a')
                f.write(i)
                f.close()
def tar_file():
        for i in commands.getoutput('ls /accesslog').splitlines():
                commands.getoutput("gzip /accesslog/%s"%i)

if  __name__=='__main__':
        touch_file()
        append_file()
        tar_file()