python多线程下载ts文件

 # -*- coding: utf-8 -*-
 """
 Created on Wed Aug 22 15:56:19 2018

 @author: Administrator
 """

 # 在python3下测试
 import requests
 import threading
 import datetime

 count =0;
 def Handler(start, end, url, filename):

     #headers = {'Range': 'bytes=%d-%d' % (start, end-1)}
     #r = requests.get(url, headers=headers, stream=True)
     for i in filename[start:end]:
         global count
         r = requests.get("https://youku.cdn2-youku.com/20180701/12972_72ec5f94/1000k/hls/"+i.replace("\n",""),stream=True)
         #r = requests.get(url)
         with open("ts/"+i.replace("\n",""), "wb") as code:
              code.write(r.content)
         count =count+1
         print("下载进度：%.2f" % (count/len(filename)))

 def download_file(url, num_thread = 100):
     f = open('index.m3u8', 'r', encoding='utf-8')
     text_list = f.readlines()
     s_list = []
     for i in text_list:
         if i.find('#EX')==-1:
             s_list.append(i)

     f.close()
     file_size = len(s_list)

     # 启动多线程写文件
     part = file_size // num_thread  # 如果不能整除，最后一块应该多几个字节
     for i in range(num_thread):
         start = part * i
         if i == num_thread - 1:   # 最后一块
             end = file_size
         else:
             end = start + part

         t = threading.Thread(target=Handler, kwargs={'start': start, 'end': end, 'url': url, 'filename': s_list})
         t.setDaemon(True)
         t.start()

     # 等待所有线程下载完成
     main_thread = threading.current_thread()
     for t in threading.enumerate():
         if t is main_thread:
             continue
         t.join()
     #print('%s 下载完成' % file_name)

 if __name__ == '__main__':
     url ="https://youku.cdn2-youku.com/20180701/12972_72ec5f94/1000k/hls/";
     start = datetime.datetime.now().replace(microsecond=0)
     download_file(url)
     end = datetime.datetime.now().replace(microsecond=0)
     print("用时: ", end='')
     print(end-start)