# -*-coding:utf-8 -*-
import urllib2, time
import threading

class MyThread(threading.Thread):
 def __init__(self, func, args):
  threading.Thread.__init__(self)
  self.args = args
  self.func = func

 def run(self):
  apply(self.func, self.args)

def open_url(url):
 request = urllib2.Request(url)
 html = urllib2.urlopen(request).read()
 print len(html)
 return html

if __name__ == '__main__':
 # 構(gòu)造url列表
 urlList = []
 for p in range(1, 10):
  urlList.append('http://s.wanfangdata.com.cn/Paper.aspx?q=%E5%8C%BB%E5%AD%A6&p=' + str(p))

 # 一般方式
 n_start = time.time()
 for each in urlList:
  open_url(each)
 n_end = time.time()
 print 'the normal way take %s s' % (n_end-n_start)

# 多線程
 t_start = time.time()
 threadList = [MyThread(open_url, (url,)) for url in urlList]
 for t in threadList:
  t.setDaemon(True)
  t.start()
 for i in threadList:
  i.join()
 t_end = time.time()
 print 'the thread way take %s s' % (t_end-t_start)

# 創(chuàng)建線程類，繼承Thread類
class MyThread(threading.Thread):
 def __init__(self, func, args):
  threading.Thread.__init__(self) # 調(diào)用父類的構(gòu)造函數(shù)
  self.args = args
  self.func = func

 def run(self): # 線程活動方法
  apply(self.func, self.args)

threadList = [MyThread(open_url, (url,)) for url in urlList] # 調(diào)用線程類創(chuàng)建新線程，返回線程列表
 for t in threadList:
  t.setDaemon(True) # 設置守護線程，父線程會等待子線程執(zhí)行完后再退出
  t.start() # 線程開啟
 for i in threadList:
  i.join() # 等待線程終止，等子線程執(zhí)行完后再執(zhí)行父線程