用Python写了个日志清理的脚本

#! /usr/bin/env python
# -*- coding: utf-8 -*-
import os,time,shutil
path = os.getcwd()
target_dir = []
cal = []
target_dir.append('/var/lib/mysql/log/')
target_dir.append('/newlogs/')
target_dir.append('/oldlogs/')
#初始化删除文件名
del_ext = ['frm','MYD','MYI']
#你要保留几天
days_before = 5
#初始化删除日期
for x in xrange(days_before+1,days_before+30):
    cal.append(time.strftime('%Y_%m_%d',time.localtime(time.time() - x*24*3600)))
#初始化删除文件名，使用笛卡尔积！
fl = map('.'.join, [[x,y] for x in cal for y in del_ext])

#以日期命名的文件夹
cal = []
for x in xrange(days_before+1,days_before+30):
    cal.append(time.strftime('%Y-%m-%d',time.localtime(time.time() - x*24*3600)))
fl += cal
#获取文件扩展名
def get_ext(filename):
    return filename.split('.')[-1]



for dirs in target_dir:
    #files = [i for i in box_list if(get_ext(i) in del_ext)]  #按扩展名筛选文件
    #修改当前工作目录
    i = 0
    print 'opening -> ' + dirs
    #判断文件夹存在
    if os.path.exists(dirs):
        #切换目录
        os.chdir(dirs)
        for files in fl:
            #判断文件夹或文件
            if(os.path.isfile(str(files))):
                i += 1
                try:
                    os.remove(files)
                    print files + '  deleted'
                except:
                    print 'error occurs while deleting file'
            elif(os.path.isdir(str(files))):
                i += 1
                try:
                #shutil.rmtree删除非空文件夹
                    shutil.rmtree(files)
                    print files + '  deleted'
                except:
                    print 'error occurs while deleting file'
    else:
        print 'Error on opening ' + dirs
    if i:
        print str(i) + ' files deleted'
    else:
        print 'nothing to remove'
    print 'leaving -> ' + dirs
    print '\n'