擅长:python、mysql、java
<p>下面是使用<code>format()</code>函数的示例:</p>
<pre><code>>>> "{:.2E}".format(Decimal('40800000000.00000000000000'))
'4.08E+10'
</code></pre>
<ul>
<li><p><a href="https://docs.python.org/3.3/library/string.html#formatspec">official documentation</a></p></li>
<li><p><a href="http://www.python.org/dev/peps/pep-3101/">original format() proposal</a></p></li>
</ul>