求助关于在__del__（）方法里不能调用time.sleep（）

还有这操作？放全文看看

全文如下

import time
def para_accept(b2):
def decorator(func):
def wrapper(self1):
print("即将结束 倒计时{}秒".format(b2))
for i in range(b2 + 1):
print(b2 - i)
time.sleep(1)
func(self1)
return wrapper
return decorator
class Announce(object):
def __init__(self, what):
网页链接 = what
@para_accept(5)
def __del__(self):
print("执行完毕" + self.what)
a = Announce("9")