擅长:python、mysql、java
<p>您可以使用<code>ljust</code>:</p>
<pre><code>data = [[' Final Receipt '], ['Milk, 2 Litres', '$ 2'], ['Potatoes', '$ 7.5'], ['Sugar', '$ 3.5']]
v, _ = max(data[1:], key=lambda x:len(x[0]))
final_data = data[0][0]+'\n'+'\n'.join(a.ljust(len(v)+3)+b for a, b in data[1:])
</code></pre>
<p>输出:</p>
<pre><code> Final Receipt
Milk, 2 Litres $ 2
Potatoes $ 7.5
Sugar $ 3.5
</code></pre>