线程池进程池

 1 from concurrent.futures import ThreadPoolExecutor  #多线程
 2 from concurrent.futures import ProcessPoolExecutor #多进程
 3 import time
 4 
 5 def func(i):
 6     print(i)
 7     time.sleep(2)
 8 
 9 pool=ThreadPoolExecutor(5)
10 
11 for i in range(50):
12     pool.submit(func,i)