擅长:python、mysql、java
<p>您可以使用<em>精度</em>字段来设置<em>最大</em>字段宽度:</p>
<pre><code>formatter = logging.Formatter('%(levelname).1s %(message)s')
</code></pre>
<p><code>.1</code>将字段宽度设置为最多一个字符,将级别截断为第一个字符:</p>
^{pr2}$
<p>参见<a href="https://docs.python.org/2/library/stdtypes.html#string-formatting-operations" rel="noreferrer"><em>String Formatting Operations</em> documentation</a>:</p>
<blockquote>
<p><em>Conversion</em>: <code>'s'</code><br/>
<em>Meaning</em>: String (converts any Python object using <code>str()</code>).<br/>
<em>Notes</em>: (6)</p>
<ol start="6">
<li>[...] The precision determines the maximal number of characters used.</li>
</ol>
</blockquote>