Python基础教程之删除指定日期前的文件

#-*- coding:gbk-*-
#jb200.com
#version 1.01
 
import getopt,sys,string
import os, datetime,time,glob
from stat import *
reload(sys)
 
sys.setdefaultencoding('utf-8')
IFS="/" #路径分割符
_delday = "7"
_deldir = "/tmp"
_delext = "log"

def getargv():
    if len(sys.argv) <2:
        usage()
        sys.exit(3)
    try:
        opts, args = getopt.getopt(sys.argv[1:], "hy:d:e:", ["help", "day=", "dir=", "rar="])
    except getopt.GetoptError:
        usage()
        sys.exit(2)
    for o, a in opts:
     if o in ("-y", "--day"):
        global _delday
        _delday = a
     elif o in ("-d", "--dir"):
        global _deldir
        _deldir = a
     elif o in ("-e", "--rar"):
        global _delrar
        _delrar = a
     else:
        usage()
        sys.exit()
def usage():
    print "this program will delete specified files at created by N days."
    print u"本程序用于删除指定目录下文件修改日期在指定时间前的指定后缀类型文件"
    print " usage:"
    print " -h, --help : this help screen"
    print " [-y 7|--day=7] : delete files before 7 day"
    print " [-e rar|--ext=log] : only delete filename extension like .log files"
    print " : support * , will delete all files"
    print " [-d /tmp|--dir=/tmp] : only delete /tmp dirctory's files"
    print " Default parameter is delete /tmp all .rar files before 7 day"
    print " Ex:"
    print " dnd.exe -y 7 -d /usr/local/apache/logs/ -e log"
    print " or"
    print " dnd.exe --day=7 --dir=/usr/local/apache/logs/ --ext=log"
 
def erasefile(Eday,Edir,Erar):
    print "Erase files program starting..."
    logpath=Edir
    count=False
    fullpath=glob.glob(Edir+'/*.'+Erar)
    for i in range(len(fullpath)):
        t1 = time.gmtime(os.stat(fullpath[i])[ST_MTIME]) #get file's mofidy time
        t11 = time.strftime('%Y-%m-%d',t1)
        year,month,day=t11.split('-')
        t111= datetime.datetime(int(year),int(month),int(day))
        t2 = time.gmtime()
        t22 = time.strftime('%Y-%m-%d',t2)
        year,month,day=t22.split('-')
        t222= datetime.datetime(int(year),int(month),int(day))
        days = (t222-t111).days
        if days>string.atof(Eday): # if over N days then remove file
                try:
                        os.remove(fullpath[i])
                        print fullpath[i] ,"deleted."
                        count = True
                        log=datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')+" remove "+fullpath[i]+" success n"
                except:
                        log=datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')+" remove "+fullpath[i]+" fail n"
                fTemp=open(logpath+IFS+"remove_file.log", 'a')
                fTemp.write(log)
    if count == False:
        print "No file be deleted."
    print "Erase files program End..."
 
if __name__ == '__main__'