python使用beautifulsoup从爱奇艺网抓取视频播放

import sys
import urllib
from urllib import request
import os
from bs4 import beautifulsoup

class dramaitem:
    def __init__(self, num, title, url):
        self.num = num
        self.title = title
        self.url = url
    def __str__(self):
        return self.num + '    ' + self.title
    def opendrama(self):
        os.startfile(self.url)

response = urllib.request.urlopen('http://www.iqiyi.com/a_19rrgja8xd.html')
html = response.read()
soup = beautifulsoup(html)
dramalist = soup.findall('div', attrs={'class':'list_block1 align_c'})
dramaitems = []

if(dramalist):
    lis = dramalist[0].findall('li')
    for li in lis:
        ps = li.findall('p')
        description = ps[1].text if len(ps)>1 else ''
        num = ps[0].find('a').text
        url = ps[0].find('a')['href']
        di = dramaitem(num, description, url)
        dramaitems.append(di)

for di in dramaitems:
    print(di)
dilen = len(dramaitems)
userchoice = int(input('input number to watch the drama:'))
if userchoice >= 1 and userchoice <=dilen:
    dramaitems[userchoice-1].opendrama()