Python 2.7 在youtube上抓取私人播放列表的数据？

我用python中的scrapy制作了爬虫。但它不起作用。它似乎成功地进行了身份验证。但在这之后，它必须移动到我的私人列表，并抓取私人列表中剪辑的每个标题。但它不起作用

我认为，在它成功地进行身份验证之后，它会转到与我预期不同的另一页

import scrapy

from scrapy.http import Request, FormRequest
from scrapy.selector import HtmlXPathSelector

class LoginSpider(scrapy.Spider):
    name = 'youtube'
    start_urls = ['https://accounts.google.com/ServiceLoginAuth']

    def parse(self, response):
        return scrapy.FormRequest.from_response(
            response,
            #formdata={'Email': 'xxx@gmail.com', 'Passwd': 'xxxx'},
            callback=self.after_login
        )

    def after_login(self, response):

        print "---------------------------------------------------------------------------"
        # print response.xpath('//div[contains(@class, "yt-alert-message")]').extract()[1]
        print response.headers["x-frame-options"]
        print "---------------------------------------------------------------------------"

        # check login succeed before going on
        if "error-msg" in response.body:
            self.logger.error("Login failed")
            return

         # We've successfully authenticated, let's have some fun!
        else:
            return Request(url="https://www.youtube.com/playlist?list=xxxxxxxx",
               callback=self.parse_tastypage)

    def parse_tastypage(self, response):
        print response.xpath("//div[@class='pl-video-title']/a/@href").extract()

---

它不是为我登录的