http://www.xxx.com/search/1.html
http://www.xxx.com/search/2.html
http://www.xxx.com/search/3.html
http://www.xxx.com/search/4.html
比如如上的URL,只有一個地方在改變,如何簡寫呢?
start_urls = [http://www.xxx.com/search/1.html]
url = "http://www.xxx.com/search/%d.html"
pageNum = 1
def parse(self,pesponse):
for sel in response.xpath("..."):
獲取數據,放入管道
yield item
if self.pageNum <= 10:
self.pageNum += 1
print('爬第:%d 頁' % self.pageNum)
new_url = self.url %d self.pageNum) #進行拼接
# callback 回調函數,頁面進行解析
yield scrapy.Request(url=new_url, callback=self.parse)
注意,這裏會出現如下錯誤:
ValueError: unsupported format character 'C'
我們需要左以下修改:
new_url = self.url.replace('%d',str(self.pageNum))