class EastSpider(scrapy.Spider):
    name = 'East'
    allowed_domains = ['****.com']
    start_urls = ['http://finance.***.com/news.html']

    def parse(self, response):
        nextUrl = response.xpath('//*[contains(@class,"page-btn")]/@href')
        for url in nextUrl.extract():
            time.sleep(1)
            yield Request(urljoin(response.url,url))

        contentUrl = response.xpath('//p[@class="title"]/a/@href')
        for urls in contentUrl.extract():
            time.sleep(1)
            yield Request(urls,callback = self.parse)

        pass

代碼如上，但是在命令行運行scrapy crawl East -o East.csv的結果，East.csv是個空文件，什么都沒寫進去。
我看人家說要yield，但是自己搞了搞也沒行...
嘗試了在for循環(huán)之外添加yield url、yield urls報錯，說是在定義之前引用了，然后在for循環(huán)之內添加又沒效果，還是空文件...