python中Queue和管道的区别

import random
import time
from multiprocessing import Process, Pipe, current_process
def produce(conn):    
while True:        
new = random.randint(0, 100)        
print('{} produce {}'.format(current_process().name, new))        
conn.send(new)        
time.sleep(random.random())
def consume(conn):    
while True:        
print('{} consume {}'.format(current_process().name, conn.recv()))        time.sleep(random.random())
if __name__ == '__main__':    
pipe = Pipe()    
p1 = Process(target=produce, args=(pipe[0],))    
p2 = Process(target=consume, args=(pipe[1],))    
p1.start()    
p2.start()