python多執行緒———2、建立多執行緒的兩種方式
阿新 • • 發佈:2018-11-12
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)