删除指定路径下固定格式，以.log结尾、三天前的文件，或删除空的日志文件

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‘)