1. 程式人生 > >python多執行緒———2、建立多執行緒的兩種方式

python多執行緒———2、建立多執行緒的兩種方式

 法一、使用Thread類例項化

法二、繼承Thread來實現多執行緒

#對於io操作來說,多執行緒和多程序效能差別不大
#1、使用Thread類例項化
import time
import threading

def get_detail_html(url):
    print("get detail html started")
    time.sleep(1)
    print("get detail html end")

def get_detail_url(url):
    print("get detail url started")
    time.sleep(2)
    print("get detail url end")




#2、通過繼承Thread來實現多執行緒
class GetDetailHtml(threading.Thread):
    def __init__(self,name):
        super().__init__(name=name)
    def run(self):
        print("get detail html started")
        time.sleep(1)
        print("get detail html end")
class GetDetailUrl(threading.Thread):
    def __init__(self,name):
        super().__init__(name=name)
    def run(self):
        print("get detail url started")
        time.sleep(1)
        print("get detail url end")


if __name__ == "__main__":
    # thread1 = threading.Thread(target=get_detail_html,args=[1,])
    # thread2 = threading.Thread(target=get_detail_url,args=[1,])
    thread1 = GetDetailHtml(1)
    thread2 = GetDetailUrl(1)
    #thread1.setDaemon(True)
    thread2.setDaemon(True)
    start_time = time.time()
    thread1.start()
    thread2.start()
    thread1.join()
    thread2.join()
    print(time.time() - start_time)