python删除目录下七天前创建的文件

#coding=utf-8
import os
import time
import  datetime
def deleteOutdateFiles(path):
    """
    删除目录下七天前创建的文件
    """
    current_time = time.strftime("%Y-%m-%d", time.localtime(time.time()))
    current_timeList = current_time.split("-")
    current_time_day = datetime.datetime(int(current_timeList[0]), int(current_timeList[1]), int(current_timeList[2]))        
    
    for root, dirs, files in os.walk(path):
        for item in files:
            file_path = os.path.join(root, item)
            create_time =  time.strftime("%Y-%m-%d", time.localtime((os.stat(file_path)).st_mtime))
            create_timeList = create_time.split("-")
            create_time_day = datetime.datetime(int(create_timeList[0]), int(create_timeList[1]), int(create_timeList[2]))
            time_difference = (current_time_day - create_time_day).days
            if time_difference > 7:
                os.remove(file_path)