{"id":751,"date":"2019-05-01T17:58:00","date_gmt":"2019-05-01T09:58:00","guid":{"rendered":"http:\/\/www.eait.co\/?p=751"},"modified":"2019-05-01T18:00:15","modified_gmt":"2019-05-01T10:00:15","slug":"%e7%ba%bf%e7%a8%8b%e4%b8%8e%e7%ba%bf%e7%a8%8b%e6%b1%a0","status":"publish","type":"post","link":"https:\/\/notes.coremix.net\/?p=751","title":{"rendered":"\u7ebf\u7a0b\u4e0e\u7ebf\u7a0b\u6c60"},"content":{"rendered":"
import time<\/div>\n
from threading import Thread<\/div>\n
<\/div>\n
def func():<\/div>\n
print(‘start’)<\/div>\n
time.sleep(2) #\u5ef6\u65f6 \u6a21\u62df\u767e\u5ea6\u53d1\u51fa\u8bf7\u6c42<\/div>\n
print(‘end’)<\/div>\n
<\/div>\n
if __name__==’__main__’:<\/div>\n
# t = Thread(target=func) #\u521b\u5efa\u51fa\u6765\u7684\u5b50\u7ebf\u7a0b<\/div>\n
# t.start()<\/div>\n
# print(‘\u4e3b\u7ebf\u7a0b\u7ed3\u675f’)<\/div>\n
<\/div>\n
t_list=[]<\/div>\n
for i in range(100):<\/div>\n
t = Thread(target=func)<\/div>\n
t_list.append(t)<\/div>\n
# t.start()<\/div>\n
#t.join()\u5199\u5230start\u540e\u9762\u5c31\u53d8\u6210\u4e86\u4e00\u4e2a\u4e00\u4e2a\u6267\u884c\u4e86(join\u7684\u4f5c\u7528\u662f\u7b49\u5f85\u8c03\u7528join\u7684\u5b50\u73b0\u573a\u7ed3\u675f)<\/div>\n
for t in t_list:<\/div>\n
t.start()<\/div>\n
for ti in t_list:<\/div>\n
t.join()<\/div>\n
<\/div>\n
print(‘\u4e3b\u7ebf\u7a0b\u7ed3\u675f’)<\/div>\n
<\/div>\n
————————————————————————————<\/div>\n
from threading import Thread<\/div>\n
import time<\/div>\n
<\/div>\n
class my_thread(Thread):<\/div>\n
def __init__(self):<\/div>\n
super(my_thread, self).__init__()<\/div>\n
def run(self):# \u5fc5\u987b\u8981\u5199 \u8fd9\u662f\u7ebf\u7a0b\u8981\u6267\u884c\u7684\u5185\u5bb9<\/div>\n
print(‘11111’)<\/div>\n
time.sleep(2)<\/div>\n
print(‘2222’)<\/div>\n
<\/div>\n
if __name__ ==’__main__’:<\/div>\n
for i in range(10):<\/div>\n
t = my_thread()<\/div>\n
t.setDaemon(True)#\u8bbe\u7f6e\u5b88\u62a4\u7ebf\u7a0b,\u4e3b\u7ebf\u7a0b\u7ed3\u675f\u65f6\u8be5\u5b50\u7ebf\u7a0b\u4e5f\u4f1a\u7ed3\u675f<\/div>\n
t.start() #\u8c03\u7528\u7ebf\u7a0b<\/div>\n
print(‘\u4e3b\u7ebf\u7a0b\u7ed3\u675f’)<\/div>\n
<\/div>\n
———————————————————————————-<\/div>\n
from threading import Thread,Lock<\/div>\n
<\/div>\n
x = 0<\/div>\n
n = 100000<\/div>\n
lock = Lock()<\/div>\n
<\/div>\n
def incr(n):<\/div>\n
global x<\/div>\n
for i in range(n):<\/div>\n
lock.acquire()<\/div>\n
x +=1<\/div>\n
lock.release()<\/div>\n
def dncr(n):<\/div>\n
global x<\/div>\n
for i in range(n):<\/div>\n
lock.acquire()<\/div>\n
x -=1<\/div>\n
lock.release()<\/div>\n
t1 = Thread(target=incr,args=(n,))<\/div>\n
t2 = Thread(target=dncr,args=(n,))<\/div>\n
t1.start()<\/div>\n
t2.start()<\/div>\n
t1.join()#\u4e0d\u52a0\u8fd9\u4e24\u4e2ajoin\u4efb\u7136\u65e0\u6cd5\u6253\u5370\u51fa0,\u56e0\u4e3a\u7ebf\u7a0b\u672a\u7ed3\u675f\u5c31print(x)\u4e86<\/div>\n
t2.join()<\/div>\n
print(x)<\/div>\n
<\/div>\n
————————————————————————<\/div>\n
\u961f\u5217<\/div>\n
import queue<\/div>\n
from threading import Thread<\/div>\n
import random<\/div>\n
<\/div>\n
q = queue.Queue(5) #\u5b9e\u4f8b<\/div>\n
def incr(q):<\/div>\n
for i in range(20):<\/div>\n
num = random.randint(1,20)<\/div>\n
q.put(num)<\/div>\n
print(‘\u6dfb\u52a0\u7684\u6570\u636e\u4e3a{},\u5f53\u524d\u961f\u5217\u7684\u957f\u5ea6\u4e3a{}’.format(num,q.qsize()))<\/div>\n
def dncr(q):<\/div>\n
for i in range(20):<\/div>\n
num = q.get()<\/div>\n
print(‘\u83b7\u53d6\u7684\u6570\u636e\u4e3a{},\u5f53\u524d\u961f\u5217\u7684\u957f\u5ea6\u4e3a{}’.format(num,q.qsize()))<\/div>\n
t1 = Thread(target = incr,args=(q,))<\/div>\n
t2 = Thread(target = dncr,args=(q,))<\/div>\n
t1.start()<\/div>\n
t2.start()<\/div>\n
t1.join()<\/div>\n
t2.join()<\/div>\n
<\/div>\n
—————————————————————————————-<\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n","protected":false},"excerpt":{"rendered":"

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