数据挖掘 - Python scrapy 高手看过来

Question

我现在有一个初始网址获得网页内容是：

http://a.com/q=boy&alias=aps

["boy",["boys clothes","boys shoes","boys toys","boys socks","boyfriend gifts","boys shorts","boys underwear","boys sandals","boys","boys baseball pants"],[{"nodes":[{"name":"Boys' Clothing","alias":"fashion-boys-clothing"},{"name":"Amazon Fashion","alias":"fashion-brands"},{"name":"Baby","alias":"baby-products"},{"name":"Baby Boys' Clothing & Shoes","alias":"fashion-baby-boys"}]},{},{},{},{},{},{},{},{},{}],[]]

而红色这一部分是我所需要抓取的部分：
同时也是下一次查找时所需要带上的参数，结果也类似下部分，
我要做的就是把所有红色部分的全部提取出来

["boy",["boys clothes","boys shoes","boys toys","boys socks","boyfriend gifts","boys shorts","boys underwear","boys sandals","boys","boys baseball pants"],[{"nodes":[{"name":"Boys' Clothing","alias":"fashion-boys-clothing"},{"name":"Amazon Fashion","alias":"fashion-brands"},{"name":"Baby","alias":"baby-products"},{"name":"Baby Boys' Clothing & Shoes","alias":"fashion-baby-boys"}]},{},{},{},{},{},{},{},{},{}],[]]

我的思路如下：

class MYItem(scrapy.Item):
    Keyword = scrapy.Field()
    Nodes = scrapy.Field()

class Spider(CrawlSpider):
    name = 'mySpider'
    allowed_domains = ['a.com']
    start_urls =  ['http://a.com/q=boy&alias=aps']

    def parse(self, response):
           #suggestvalueArr 得到这样一个字符串数组  ["boys clothes","boys shoes","boys toys","boys socks","boyfriend gifts","boys shorts","boys underwear","boys sandals","boys","boys baseball pants"]
            for sel in suggestvalueArr:
                item = MYItem()
                item['Keyword'] = sel
                item['Nodes'] = nodes
                yield item

            for sel in suggestvalueArr:
                tmpurl = "http://a.com&q=%s&search-alias=aps"%sel
                yield scrapy.Request(tmpurl, callback=self.parse)

我为什么感觉我的结果没有完全抓取完就结束了，有没有人看出问题所在了？谢谢了