import os,datetime

#判断文件是否为空，如果为空则删除

def del_file(file):

    with open(file,encoding='utf-8') as f:

        if f.read():

            pass

        else:

            f.close()

            os.remove(file)

#查找指定路径下xx结尾的文件

def search_file(path,name):

    for cur_dir,dirs,files in os.walk(path):

        for file in files:

            if name in file:

                abs_path = os.path.join(cur_dir,file)

                print('找到%s文件，路径是%s'%(file,abs_path))

                file_date = file[-14:-4]

                file_datetime = datetime.datetime.strptime(file_date,'%Y-%m-%d')

                now = datetime.datetime.now()

                sub_day = (now - file_datetime).days

                if sub_day > 3:

                    os.remove(abs_path)

                else:

                    del_file(abs_path)

search_file('\练习\logs',name = '.log')