异步非阻塞python3代码

    同步和异步描述的是任务的提交方式，同步意味着等待，异步意味不等待。

    阻塞和非阻塞描述的是程序的运行状态，阻塞意味着程序处于阻塞态，非阻塞意味着程序处于就绪态或运行态

测试代码1

文件名：async_nonblock.py 
#!/bin/env python3
#coding = utf-8

import time
from threading import Thread

def start_async(*args):
    func =  args[0]
    def start_thread(*args,**kwargs):
        t =  Thread(target=func,args=args,kwargs=kwargs)
        t.start()
        t.start()
    return start_thread

@start_async        
def new_thread(*args):
    while True:
       print('endless loop,blocking !!!!')
       time.sleep(1)

if __name__ == '__main__':
    new_thread()
    t0 = time.time()
    while time.time() - t0 < 12:
        time.sleep(3)
        print('main process is running !!!!')    

测试代码2

#!/bin/env python3
#coding = utf-8

from multiprocessing import Process
import time

def task(name,n):
    print('%s is running'%name)
    time.sleep(n)
    print('%s is over'%name)

if __name__ == '__main__':
    
    start_time =  time.time()
    p_list = []
    for i in range(1,4):
        p = Process(target=task,args=('subprocess %s'%i,i))
        p.start()
        p_list.append(p)
    for p in p_list:
        p.join()

    print('main process is running',time.time()-start_time)