定时器、线程queue、进程池和线程池

1.定时器

指定n秒后，执行任务

 1 from threading import Timer,current_thread
 2 import os
 3 
 4 
 5 def hello():
 6     print("%s hello, world"%os.getpid())
 7     print("%s hello, world"%current_thread().name)
 8 
 9 
10 t = Timer(3, hello)
11 t.start()  # after 1 seconds, "hello, world" will be printed
12 print(os.getpid())
13 print(current_thread())
14 
15 # 12376
16 # <_MainThread(MainThread, started 12008)>
17 # 12376 hello, world
18 # Thread-1 hello, world

定时器