擅长:python、mysql、java
<p>在代码的最后三行</p>
<p><strong>船[-1][船]-=1</strong></p>
<blockquote>
<p>To refer the elements in 2-dimensional array i.e in PYTHON a list containing 2 lists we use <strong>integer</strong> values as index. </p>
</blockquote>
<p>变量<strong>Ships</strong>是字符串<strong><em>或</em><strong>None</strong>如果上述任何条件未满足,则<strong>Ships</strong>不是整数。你知道吗</p>
<pre>
TypeError: string indices must be integers, not str
</pre>
<p>因此,您需要使用<strong>整数访问列表(<em>数组</em>)</p>