擅长:python、mysql、java
<p>一个有用的函数是<code>apply</code>:</p>
<pre><code>data_df['position'] = data_df['salary'].apply(lambda salary: 'Normal Employee' if salary <= 8000 else 'Experienced Employee', axis=1)
</code></pre>
<p>这将<code>lambda</code>函数应用于salary列中的每个元素。</p>