Python语法之线程思维导图解析

无情 阅读:220 2021-03-31 13:38:17 评论:0

Python3 功能代码:

import io 
import sys 
import threading,time,random 
from queue import Queue 
 
sys.stdout = io.TextIOWrapper(sys.stdout.detach(),encoding='utf-8') 
 
# 线程实现方式一:使用threading 模块创建线程 
def process(): 
    for i in range(3): 
        time.sleep(1) 
        print("当前线程名称为 %s" % threading.current_thread().name) 
 
print("---主线程开始---") 
threads = [threading.Thread(target=process) for i in range(4)] 
# 线程启动 
for t in threads: 
    t.start() 
# 线程等待 
for t in threads: 
    t.join() 
print("---主线程结束---") 
 
# 线程实现方式二:Thread 子类创建线程 
class subThread(threading.Thread): 
    def run(self): 
        for i in range(3): 
            time.sleep(1) 
            msg = "子线程" + self.name + "执行,i =" + str(i) 
            print(msg) 
 
print("----主线程开始---") 
one = subThread() 
two = subThread() 
 
one.start() 
two.start() 
one.join() 
two.join() 
print("----主线程结束---") 
 
# 互斥锁 
n = 100 
def task(): 
    global n 
    mutex.acquire() 
    temp = n 
    time.sleep(0.2) 
    n = temp -1 
    print('购票成功,剩余%d张电影票' %n) 
    mutex.release() 
 
print("----开始购票---") 
mutex = threading.Lock() 
t_l = [] 
for i in range(10): 
    t = threading.Thread(target=task) 
    t_l.append(t) 
    t.start() 
for t in t_l: 
    t.join() 
print("----购票结束--") 
 
# 队列在线程之间的通信 
class Producer(threading.Thread): 
    def __init__(self, name, queue): 
        threading.Thread.__init__(self,name = name) 
        self.data = queue 
    def run(self): 
        for i in range(5): 
            print("生产者%s将产品%d加入队列中!"%(self.getName(),i)) 
            self.data.put(i) 
            time.sleep(random.random()) 
        print("生产者%s完成"%self.getName()) 
 
class Consumer(threading.Thread): 
    def __init__(self, name, queue): 
        threading.Thread.__init__(self,name = name) 
        self.data = queue 
    def run(self): 
        for i in range(5): 
            val = self.data.get() 
            print("消费者%s将产品%d从队列中取出!"%(self.getName(),val)) 
            time.sleep(random.random()) 
        print("消费者%s完成"%self.getName()) 
 
print("----生产/消费者模式开始---") 
queue = Queue() 
producer = Producer('Producer',queue) 
consumer = Consumer('Consumer',queue) 
producer.start() 
consumer.start() 
consumer.join() 
producer.join() 
print("----生产/消费者模式结束---") 

 

 

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