如何从这个弹出窗口中抓取文本？[Python和Scrapy]

import scrapy
from scrapy.http import FormRequest

class MySpider(scrapy.Spider):
    name = 'my_spider'
    
    def start_requests(self):
        yield FormRequest(url='http://example.com', callback=self.parse)

    def parse(self, response):
        # 在这里处理响应，提取所需的文本数据
        text = response.css('div.popup-window::text').get()
        yield {'text': text}

if __name__ == "__main__":
    from scrapy.crawler import CrawlerProcess

    process = CrawlerProcess()
    process.crawl(MySpider)
    process.start()