擅长:python、mysql、java
<p>根据<a href="https://docs.python.org/2/reference/lexical_analysis.html#identifiers" rel="noreferrer">Python Language Reference, §2.3, "Identifiers and keywords"</a>,有效的Python标识符定义为:</p>
<pre><code>(letter|"_") (letter | digit | "_")*
</code></pre>
<p>或者,在<strong>regex中:</p>
<pre><code>[a-zA-Z_][a-zA-Z0-9_]*
</code></pre>