import threading
class MyThread(threading.Thread):
  """重写多线程，使其能够返回值"""
  def __init__(self, target=None, args=()):
    super(MyThread, self).__init__()
    self.func = target
    self.args = args

  def run(self):
    self.result = self.func(*self.args)

  def get_result(self):
    try:
      return self.result # 如果子线程不使用join方法，此处可能会报没有self.result的错误
    except Exception:
      return None

def parse_detail_page(self,items_list):
  retval, RetList, _Threads = [], [], []
  for url in items_list:
    t = MyThread(target=self.threadItem, args=(url,))
    t.start()
    _Threads.append(t)
  for t in _Threads:
    t.join()
    retval.append(t.get_result())
def threadItem(self,url):
  """多线程请求""" 
 response = requests.get(url)
  return response.text