擅长:python、mysql、java
<p>您需要为该特定字段设置<a href="http://doc.scrapy.org/en/latest/topics/loaders.html#scrapy.contrib.loader.processor.Join" rel="nofollow">^{<cd1>}</a>输出处理器:</p>
<pre><code>import scrapy
from scrapy.contrib.loader.processor import Join
class MyItem(scrapy.Item):
my_field = scrapy.Field(output_processor=Join(separator=','))
</code></pre>