擅长:python、mysql、java
<p>如果<em>S</em>和<em>T</em>是序列,<code>S[a:b] = T</code>将用<em>T</em>的元素替换<em>S</em>的索引<em>a</em>到<em>b-1</em>的子序列<br/>
如果<code>a == b</code>,它将充当一个简单的插入。<br/>
而且{<cd3>}与{<cd4>}是一样的:所以它是在前面的一个简单插入</p>
<pre><code>s = [11,22,33,44,55,66,77]
s[3:3] = [1,2,3] # insertion at position 3
print( s )
s = [11,22,33,44,55,66,77]
s[3:4] = [1,2,3] # deletion of element at position 3, and then insertion
print( s )
s = [11,22,33,44,55,66,77]
s[3:6] = [1,2,3] # deletion of elements from position 3 to 5, and then insertion
print( s )
s = [11,22,33,44,55,66,77]
s[:] = [1,2,3] # deletion of all elements, and then insertion : whole replacement
print( s )
</code></pre>
<p>输出:</p>
<pre><code>[11, 22, 33, 1, 2, 3, 44, 55, 66, 77]
[11, 22, 33, 1, 2, 3, 55, 66, 77]
[11, 22, 33, 1, 2, 3, 77]
[1, 2, 3]
</code></pre>