擅长:python、mysql、java
<p><code>__getitem__</code>始终只接受一个参数。可以传递多个参数,但这实际上只是将其转换为元组:</p>
<pre class="lang-py prettyprint-override"><code>>>> a = []
>>> a[1, 2]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: list indices must be integers or slices, not tuple
</code></pre>
<p>注意错误消息中的“非元组”</p>