Python 为什么可以'；我不能从url获取曲目标题吗？

我正在尝试编写一个python脚本，它使用BeautifulSoup从中获取曲目标题。我希望能够输出：

391106-布鲁斯·帕丁顿计划 400311-退休色彩师

但是我找不到标签。这是我的剧本：

#!/usr/bin/env python

import getopt, sys
# screen scraping stuff
import urllib2
import re
from bs4 import BeautifulSoup


def usage ( msg ):
        print """
usage: get_titles_sherlockholmes_basil.py

%s
""" % ( msg )
#end usage

def output_html ( url ):

        soup = BeautifulSoup(urllib2.urlopen( url ).read())

        #title = soup.find_all("div", class_="ttl")
        #titles = soup.find_all(class_="ttl")
        #titles = soup.find_all('<div class="ttl">')
        #titles = soup.select("div.ttl")
        #titles = soup.find_all("div", attrs={"class": "ttl"})
        #titles = soup.find_all("div", class_="jwrow")
        #titles = soup.find_all("div", id="jw6_list")
        titles = soup.find_all(id="jw6_list")
        for title in titles:
                print "%s <br>\n" % title
# end output_html

url = 'http://archive.org/details/HQSherlockRathboneTCS'
output_html ( url )
print "<br>-------------------<br>"
sys.exit()

#/usr/bin/env python
导入getopt，sys
#刮网材料
导入urllib2
进口稀土
从bs4导入BeautifulSoup
def使用量（msg）：
打印“”
用法：get_titles_sherlockholmes_basil.py
%
“”“%（msg）
#最终用途
def输出_html（url）：
soup=BeautifulSoup（urlib2.urlopen（url.read（））
#标题=汤。查找所有（“div”，class=“ttl”）
#标题=汤。查找所有（class=“ttl”）
#标题=汤。查找所有（“”）
#标题=汤。选择（“div.ttl”）
#titles=soup.find_all（“div”，attrs={“class”：“ttl”}）
#标题=汤。查找所有（“div”，class=“jwrow”）
#titles=soup.find_all（“div”，id=“jw6_list”）
titles=soup.find_all（id=“jw6_list”）
标题中的标题：
打印“%s
\n”%title
#结束输出\u html
url='1〕http://archive.org/details/HQSherlockRathboneTCS'
输出html（url）
打印“
--------------
”
sys.exit（）

---

我知道我做错了什么。感谢您的帮助

问题在于，播放列表是在浏览器中借助javascript形成的。实际曲目列表位于javascript数组中的

脚本
标记内：

<script type="text/javascript">    

Play('jw6', 
     [{"title":"1. 391106 - Bruce-Partington Plans","image":"/download/HQSherlockRathboneTCS/391106.png","duration":1764,"sources":[{"file":"/download/HQSherlockRathboneTCS/391106.mp3","type":"mp3","height":"0","width":"0"}],"tracks":[{"file":"https://archive.org/stream/HQSherlockRathboneTCS/391106.png&vtt=vtt.vtt","kind":"thumbnails"}]},
{"title":"2. 400311 - The Retired Colourman","image":"/download/HQSherlockRathboneTCS/400311.png","duration":1755,"sources":[{"file":"/download/HQSherlockRathboneTCS/400311.mp3","type":"mp3","height":"0","width":"0"}],"tracks":[{"file":"https://archive.org/stream/HQSherlockRathboneTCS/400311.png&vtt=vtt.vtt","kind":"thumbnails"}]},
...
{"title":"32. 460204 - The Cross of Damascus","image":"/download/HQSherlockRathboneTCS/460204.png","duration":"1720.07","sources":[{"file":"/download/HQSherlockRathboneTCS/460204.mp3","type":"mp3","height":"0","width":"0"}],"tracks":[{"file":"https://archive.org/stream/HQSherlockRathboneTCS/460204.png&vtt=vtt.vtt","kind":"thumbnails"}]}], 
     {"start":0,"embed":null,"so":false,"autoplay":false,"width":0,"height":0,"audio":true,"responsive":true,"expand4wideVideos":false,"flash":false,"startPlaylistIdx":0,"identifier":"HQSherlockRathboneTCS","collection":"oldtimeradio","waveformer":"jw-holder","hide_list":false});

</script>

印刷品：

1. 391106 - Bruce-Partington Plans
2. 400311 - The Retired Colourman
3. 440515 - Adventure Of The Missing Bloodstain
4. 450326 - The Book of Tobit
5. 450402 - The Amateur Mendicant Society
...
30. 460121 - Telltale Pigeon Feathers
31. 460128 - Sweeney Todd, Demon Barber
32. 460204 - The Cross of Damascus

1. 391106 - Bruce-Partington Plans
2. 400311 - The Retired Colourman
3. 440515 - Adventure Of The Missing Bloodstain
4. 450326 - The Book of Tobit
5. 450402 - The Amateur Mendicant Society
...
30. 460121 - Telltale Pigeon Feathers
31. 460128 - Sweeney Todd, Demon Barber
32. 460204 - The Cross of Damascus