擅长:python、mysql、java
<p>如果要输出2位数字:</p>
<pre><code>for n in [1.23,1.234,1.1,1.7846]:
print('{:.2f}'.format(n))
</code></pre>
<p>输出:</p>
<pre><code>1.23
1.23
1.10
1.78
</code></pre>
<p>快速阅读python3格式:<a href="https://pyformat.info/#number" rel="nofollow noreferrer">https://pyformat.info/#number</a>或此处:<a href="https://docs.python.org/3.1/library/string.html#format-examples" rel="nofollow noreferrer">https://docs.python.org/3.1/library/string.html#format-examples</a></p>