擅长:python、mysql、java
<p>我自己仍在学习Python,但我认为<em>切片</em>的工作方式是索引指向两个位置之间,因此<code>0:1</code>只能得到第一列。这就是你问的问题吗?在</p>
<p>这是<a href="http://docs.python.org/tutorial/introduction.html#strings" rel="nofollow noreferrer">documentation</a>要说的:</p>
<blockquote>
<p>One way to remember how slices work is
to think of the indices as pointing
between characters, with the left edge
of the first character numbered 0.
Then the right edge of the last
character of a string of n characters
has index n, for example:</p>
</blockquote>
<pre><code> + -+ -+ -+ -+ -+
| H | e | l | p | A |
+ -+ -+ -+ -+ -+
0 1 2 3 4 5
-5 -4 -3 -2 -1
</code></pre>