擅长:python、mysql、java
<p>使用列表理解是很好的。在</p>
<pre><code>output = [[i] * i for i in range(1, n + 1)]
</code></pre>
<p>见<a href="https://stackoverflow.com/questions/3459098/create-list-of-single-item-repeated-n-times-in-python">Create List of Single Item Repeated n Times in Python</a></p>