擅长:python、mysql、java
<p><code>items()</code>返回一个视图对象,该对象允许您迭代<code>(key, value)</code>元组。所以基本上你可以像处理元组那样操作它们。<a href="https://docs.python.org/3/library/stdtypes.html?highlight=items#dictionary-view-objects" rel="nofollow noreferrer">document</a>可能有助于:</p>
<blockquote>
<p>iter(dictview)
Return an iterator over the keys, values or items (represented as tuples > of (key, value)) in the dictionary.</p>
</blockquote>
<p>另外,我认为<code>print(i, j)[1]</code>在Python 3中会导致错误,因为<code>print(i, j)</code>返回<code>None</code>。</p>