管道
from multiprocessing import Process,Pipe
import os,time
#创建管道对象
#当参数为False的时候child只能recv parent只能send
# child_conn,parent_conn = Pipe(False)
child_conn,parent_conn = Pipe()
#子进程函数
def fun(name):
time.sleep(1)
#发送一个字符串到管道
child_conn.send('hello' + str(name))
print(os.getppid(),"----",os.getpid())
jobs = []
#创建5个子进程
for i in range(5):
p = Process(target = fun,args = (i,))
jobs.append(p)
p.start()
for i in range(5):
data = parent_conn.recv()
print(data)
for i in jobs:
i.join()