Python之Pool

#!/usr/bin/env python
from multiprocessing import Pool
import time
def sayHi(a):
        time.sleep(5)
        return a**a
if __name__ =="__main__":
        p=Pool(processes=5)
        result=p.apply_async(sayHi,[10])
        print result.get()
一个池子启用5个线程池，且异步一次返回结果
可以用for循环使用多次异步：
#!/usr/bin/env python
from multiprocessing import Pool
import time
def sayHi(a):
        time.sleep(5)
        return a**a
p=Pool(processes=5)
result_list=[]
for i in range(100):
        result_list.append(p.apply_async(sayHi,[i]))
for j in result_list:
        print j.get()