<p>我得到这个错误:</p>
<blockquote>
<p>TypeError: object of type 'Cursor' has no len()</p>
</blockquote>
<p>当我试图执行时:</p>
<pre><code>reply = db['test'].find({"date":{"$gt":date_query}} ,{"date":1,"route_id":1,"loc":1,"_id":0})
length = len(reply)
</code></pre>