擅长:python、mysql、java
<p>将<a href="http://docs.python.org/3/library/stdtypes.html#str.join">^{<cd1>}</a>与<a href="https://docs.python.org/3/tutorial/classes.html#generator-expressions">generator expression</a>一起使用:</p>
<pre><code>>>> a = [[1,2], [3,4], [5,6]]
>>> '\n'.join(''.join(map(str, xs)) for xs in a)
'12\n34\n56'
</code></pre>