擅长:python、mysql、java
<p>请参阅<a href="http://doc.scrapy.org/en/latest/topics/item-pipeline.html#activating-an-item-pipeline-component">Activating an Item Pipeline component</a>的废文档,例如:</p>
<pre><code>ITEM_PIPELINES = {
'myproject.pipeline.custompipeline': 300,
}
</code></pre>
<blockquote>
<p>The integer values you assign to classes in this setting determine the order they run in- items go through pipelines from order number low to high. It’s customary to define these numbers in the 0-1000 range.</p>
</blockquote>