转自：http://www.cnblogs.com/alex3714/articles/5230609.html
def hello():
def
hello():
print
(
"hello, world"
)
t
=
Timer(
30.0
, hello)
t.start()
# after 30 seconds, "hello, world" will be printed
Timer
原文：https://www.cnblogs.com/zhangxuan/p/9270478.html
