TypeError: Unsupported deadline datetime.datetime(....)

Question

我正在尝试运行在 Tornado 中定期使用 IOLoop 的函数。但是，下面的代码会报错？

TypeError: Unsupported deadline datetime.datetime(2021, 11, 11, 0, 35, 49, 445200)

from tornado.ioloop import IOLoop
import datetime

def schedule_next_email():
    # t = datetime.date.today() + datetime.timedelta(seconds=10)
    t = datetime.datetime.now() + datetime.timedelta(seconds=10)
    # t2 = datetime.datetime.combine(t, datetime.time.min)
    def wrapper():
        print('test')
        schedule_next_email()
    IOLoop.current().add_timeout(t, wrapper)  # Error

schedule_next_email()

参考：

Traceback (most recent call last):
  File "", line 1, in 
  File "", line 8, in schedule_next_email
  File "C:\Users\...\anaconda3\lib\site-packages\tornado\ioloop.py", line 585, in add_timeout
    raise TypeError("Unsupported deadline %r" % deadline)
TypeError: Unsupported deadline datetime.datetime(2021, 11, 11, 0, 47, 28, 944375)

Answer 1

add_timeout 采用 timedelta，而不是 datetime 作为截止日期参数，因此只需直接传递 timedelta：

from tornado.ioloop import IOLoop
import datetime

def schedule_next_email():
    t = datetime.timedelta(seconds=10)
    def wrapper():
        print('test')
        schedule_next_email()
    IOLoop.current().add_timeout(t, wrapper)

schedule_next_email()

确保IO循环以一种或另一种方式开始；出于测试目的，我在末尾添加了 IOLoop.current().start()，但生产代码可能会有所不同。

TypeError: Unsupported deadline datetime.datetime(....)

TypeError: Unsupported deadline datetime.datetime(....)

python

tornado