python多线程————3、多线程间通信：共享变量，queue

1、共享变量

#通过共享变量
import time
import threading
url_list = []
def get_detail_html():
    global url_list
    while True:
        if len(url_list):
            url_list.pop()
            print("get detail html started")
            time.sleep(3)
            print("get detail html end")

def get_detail_url():
    while True:
        global url_list
        print("get detail url started")
        url_list.append(1)
        time.sleep(1)
        print("get detail url end")

if __name__ == "__main__":
    thread2 = threading.Thread(target=get_detail_url)
    thread2.start()
    for i in range(2):
        thread1 = threading.Thread(target=get_detail_html)
        thread1.start()
        #thread1.join()
    #thread1.setDaemon(True)
    #thread2.setDaemon(True)
    start_time = time.time()



    #thread2.join()
    print(time.time() - start_time)

 2、通过queue

#通过queue
import time
import threading
from queue import Queue
def get_detail_html(queue):
    while True:
            queue.put()
            print("get detail html started")
            time.sleep(3)
            print("get detail html end")

def get_detail_url(queue):
    while True:
        print("get detail url started")
        queue.get(1)
        time.sleep(1)
        print("get detail url end")

if __name__ == "__main__":
    url_queue = Queue(maxsize=1000)
    thread2 = threading.Thread(target=get_detail_url,args=(url_queue,))
    thread2.start()
    for i in range(2):
        thread1 = threading.Thread(target=get_detail_html,args=(url_queue,))
        thread1.start()
        #thread1.join()
    #thread1.setDaemon(True)
    #thread2.setDaemon(True)
    start_time = time.time()



    #thread2.join()
    print(time.time() - start_time)